chore: Disable docs.github.com for link checks (#4945)

This was causing CI to fail... maybe they have bot detection?

.github/workflows/mlc_config.json

@@ -9,6 +9,12 @@
         {
             "pattern": "developer.github.com"
         },
+        {
+            "pattern": "docs.github.com"
+        },
+        {
+            "pattern": "support.google.com"
+        },
         {
             "pattern": "tailscale.com"
         }