Fix pattern

Author: tvdijen

.github/workflows/reusable_linter.yml

@@ -99,6 +99,8 @@ jobs:
 
       - name: Lint JSON
         uses: limitusus/json-syntax-check@v2
+        with:
+          pattern: "\.json$"
 
   style-linter:
     if: inputs.enable_stylelinter == true