feat(icons): add free-dns (#1147)

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

tree.json

@@ -600,6 +600,7 @@
         "fossil.png",
         "foundry-vtt.png",
         "franz.png",
+        "free-dns.png",
         "freebox-delta.png",
         "freebox-pop.png",
         "freebox-revolution.png",
@@ -4560,6 +4561,7 @@
         "fossil.webp",
         "foundry-vtt.webp",
         "franz.webp",
+        "free-dns.webp",
         "freebox-delta.webp",
         "freebox-pop.webp",
         "freebox-revolution.webp",