Fix workflow for documentation (#1607)

.github/workflows/documentation.yaml

@@ -7,8 +7,8 @@ on:
       - reopened
       - synchronize
     paths:
-      - 'documentation/*'
-      - './*.md'
+      - 'documentation/**'
+      - '**.md'
 jobs:
   build-and-test:
     runs-on: ubuntu-latest