test docs workflow

.github/workflows/pull_request.yaml

@@ -56,6 +56,25 @@ jobs:
         check-latest: true
         cache: true
 
+    - uses: dorny/paths-filter@v3
+      id: filter
+      with:
+        filters: |
+          docs:
+            - '.markdownlint.yaml'
+            - '.vale.ini'
+            - 'Dockerfile-docs'
+            - 'docs-nginx.conf'
+            - 'docs/**'
+            - 'README.md'
+            - 'theme_common'
+            - 'theme_override'
+
+    # run only if 'workflows' files were changed
+    - name: workflow tests
+      if: steps.filter.outputs.docs == 'true'
+      run: echo "Workflow file"
+
     # Get highest tag and remove any suffixes with '-'
     - name: Get Highest tag
       id: highest_tag
@@ -63,11 +82,6 @@ jobs:
         highest=$(git tag -l --sort -version:refname | head -n 1)
         echo "tag=${highest%%-*}" >> $GITHUB_OUTPUT
 
-    # Get highest tag and remove any suffixes with '-'
-    - name: Print Highest tag
-      run: |
-        echo ${{ steps.highest_tag.outputs.tag }}
-
     - name: Install Dependencies
       run: |
         make install