feat(icons): add deepseek (#972)

Co-authored-by: Dashboard Icons Manager <193821040+dashboard-icons-manager[bot]@users.noreply.github.com>

tree.json

@@ -365,6 +365,7 @@
         "ddns-updater.png",
         "debian-linux.png",
         "deemix.png",
+        "deepseek.png",
         "deezer.png",
         "defguard.png",
         "dell.png",
@@ -2409,6 +2410,7 @@
         "ddclient.svg",
         "ddns-updater.svg",
         "debian-linux.svg",
+        "deepseek.svg",
         "deezer.svg",
         "defguard.svg",
         "dell.svg",
@@ -4202,6 +4204,7 @@
         "ddns-updater.webp",
         "debian-linux.webp",
         "deemix.webp",
+        "deepseek.webp",
         "deezer.webp",
         "defguard.webp",
         "dell.webp",