chore: update title check CI (#6279)

Author: kt3k

.github/workflows/title.yml

@@ -52,14 +52,14 @@ jobs:
             fmt(/unstable)?
             front-matter(/unstable)?
             fs(/unstable)?
+            functions(/unstable)?
             html(/unstable)?
             http(/unstable)?
             ini(/unstable)?
             internal
             io(/unstable)?
             json(/unstable)?
             jsonc(/unstable)?
-            kv(/unstable)?
             log(/unstable)?
             media-types(/unstable)?
             msgpack(/unstable)?