update vale workflow (25.2.3+)

Author: DevExpressExampleBot

.github/workflows/vale.yml

@@ -3,6 +3,8 @@ on:
   pull_request:
     paths:
     - README.md
+    - readme.md
+    - Readme.md
 
 jobs:
   vale:
@@ -22,7 +24,7 @@ jobs:
       - name: vale linter check
         uses: DevExpress/vale-action@reviewdog
         with:
-          files: README.md
+          files: '["[Rr]eadme.md"]'
           fail_on_error: true
           filter_mode: nofilter
-          reporter: github-check
+          reporter: github-check