docs: Add YT to footer (#8566)

Add YT to footer

Author: BekahHW

docs/docs.json

@@ -343,7 +343,8 @@
       "x": "https://twitter.com/continuedev",
       "github": "https://github.com/continuedev/continue",
       "linkedin": "https://linkedin.com/company/continuedev",
-      "discord": "https://discord.gg/vapESyrFmJ"
+      "discord": "https://discord.gg/vapESyrFmJ",
+      "youtube": "https://www.youtube.com/@continuedev"
     }
   },
   "contextual": {