fix vale

Author: devalog

.github/workflows/vale.yml

@@ -6,7 +6,6 @@ on:
       - '**.md'
       - '.vale/**'
       - '.vale.ini'
-      - '!**/changelog/**'
 
 jobs:
   vale:
@@ -18,5 +17,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - uses: errata-ai/vale-action@reviewdog
+        with:
+          files: fern
         env:
           GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}