Bump @angular/common, @angular/cdk, @angular/forms, @angular/material, @angular/material-moment-adapter, @angular/platform-browser, @angular/platform-browser-dynamic, @angular/router and ngx-markdown

Bumps [@angular/common](https://github.com/angular/angular/tree/HEAD/packages/common), [@angular/cdk](https://github.com/angular/components), [@angular/forms](https://github.com/angular/angular/tree/HEAD/packages/forms), [@angular/material](https://github.com/angular/components), [@angular/material-moment-adapter](https://github.com/angular/components), [@angular/platform-browser](https://github.com/angular/angular/tree/HEAD/packages/platform-browser), [@angular/platform-browser-dynamic](https://github.com/angular/angular/tree/HEAD/packages/platform-browser-dynamic), [@angular/router](https://github.com/angular/angular/tree/HEAD/packages/router) and [ngx-markdown](https://github.com/jfcere/ngx-markdown). These dependencies needed to be updated together.

Updates `@angular/common` from 13.3.12 to 21.1.3
- [Release notes](https://github.com/angular/angular/releases)
- [Changelog](https://github.com/angular/angular/blob/main/CHANGELOG.md)
- [Commits](https://github.com/angular/angular/commits/v21.1.3/packages/common)

Updates `@angular/cdk` from 13.3.9 to 21.1.3
- [Release notes](https://github.com/angular/components/releases)
- [Changelog](https://github.com/angular/components/blob/main/CHANGELOG.md)
- [Commits](https://github.com/angular/components/compare/13.3.9...v21.1.3)

Updates `@angular/forms` from 13.3.12 to 21.1.3
- [Release notes](https://github.com/angular/angular/releases)
- [Changelog](https://github.com/angular/angular/blob/main/CHANGELOG.md)
- [Commits](https://github.com/angular/angular/commits/v21.1.3/packages/forms)

Updates `@angular/material` from 13.3.9 to 21.1.3
- [Release notes](https://github.com/angular/components/releases)
- [Changelog](https://github.com/angular/components/blob/main/CHANGELOG.md)
- [Commits](https://github.com/angular/components/compare/13.3.9...v21.1.3)

Updates `@angular/material-moment-adapter` from 13.3.9 to 21.1.3
- [Release notes](https://github.com/angular/components/releases)
- [Changelog](https://github.com/angular/components/blob/main/CHANGELOG.md)
- [Commits](https://github.com/angular/components/compare/13.3.9...v21.1.3)

Updates `@angular/platform-browser` from 13.3.12 to 21.1.3
- [Release notes](https://github.com/angular/angular/releases)
- [Changelog](https://github.com/angular/angular/blob/main/CHANGELOG.md)
- [Commits](https://github.com/angular/angular/commits/v21.1.3/packages/platform-browser)

Updates `@angular/platform-browser-dynamic` from 13.3.12 to 21.1.3
- [Release notes](https://github.com/angular/angular/releases)
- [Changelog](https://github.com/angular/angular/blob/main/CHANGELOG.md)
- [Commits](https://github.com/angular/angular/commits/v21.1.3/packages/platform-browser-dynamic)

Updates `@angular/router` from 13.3.12 to 21.1.3
- [Release notes](https://github.com/angular/angular/releases)
- [Changelog](https://github.com/angular/angular/blob/main/CHANGELOG.md)
- [Commits](https://github.com/angular/angular/commits/v21.1.3/packages/router)

Updates `ngx-markdown` from 13.1.0 to 21.1.0
- [Release notes](https://github.com/jfcere/ngx-markdown/releases)
- [Commits](https://github.com/jfcere/ngx-markdown/compare/v13.1.0...v21.1.0)

---
updated-dependencies:
- dependency-name: "@angular/common"
  dependency-version: 21.1.3
  dependency-type: direct:production
- dependency-name: "@angular/cdk"
  dependency-version: 21.1.3
  dependency-type: direct:production
- dependency-name: "@angular/forms"
  dependency-version: 21.1.3
  dependency-type: direct:production
- dependency-name: "@angular/material"
  dependency-version: 21.1.3
  dependency-type: direct:production
- dependency-name: "@angular/material-moment-adapter"
  dependency-version: 21.1.3
  dependency-type: direct:production
- dependency-name: "@angular/platform-browser"
  dependency-version: 21.1.3
  dependency-type: direct:production
- dependency-name: "@angular/platform-browser-dynamic"
  dependency-version: 21.1.3
  dependency-type: direct:production
- dependency-name: "@angular/router"
  dependency-version: 21.1.3
  dependency-type: direct:production
- dependency-name: ngx-markdown
  dependency-version: 21.1.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

webapp/frontend/package.json

@@ -21,16 +21,16 @@
     "private": true,
     "dependencies": {
         "@angular/animations": "v13-lts",
-        "@angular/cdk": "v13-lts",
-        "@angular/common": "v13-lts",
+        "@angular/cdk": "v21-lts",
+        "@angular/common": "v21-lts",
         "@angular/compiler": "v13-lts",
         "@angular/core": "v13-lts",
-        "@angular/forms": "v13-lts",
-        "@angular/material": "v13-lts",
-        "@angular/material-moment-adapter": "v13-lts",
-        "@angular/platform-browser": "v13-lts",
-        "@angular/platform-browser-dynamic": "v13-lts",
-        "@angular/router": "v13-lts",
+        "@angular/forms": "v21-lts",
+        "@angular/material": "v21-lts",
+        "@angular/material-moment-adapter": "v21-lts",
+        "@angular/platform-browser": "v21-lts",
+        "@angular/platform-browser-dynamic": "v21-lts",
+        "@angular/router": "v21-lts",
         "@types/humanize-duration": "^3.27.1",
         "crypto-js": "^4.1.1",
         "highlight.js": "^11.6.0",
@@ -38,7 +38,7 @@
         "lodash": "4.17.23",
         "moment": "^2.29.4",
         "ng-apexcharts": "^1.7.4",
-        "ngx-markdown": "^13.1.0",
+        "ngx-markdown": "^21.1.0",
         "perfect-scrollbar": "^1.5.5",
         "quill": "^1.3.7",
         "rrule": "^2.7.1",