fail job if nothing changed

.gitea/workflows/diff-output.yaml

@@ -23,9 +23,6 @@ jobs:
       is_changed: ${{ steps.changed-files-specific.outputs.any_changed }}
 
     steps:
-      - name: Echo test
-        run: echo "${{ inputs.files }}"
-
       - name: Checkout Code to Build
         uses: actions/checkout@v4
         with:
@@ -39,6 +36,8 @@ jobs:
         with:
           files: ${{ inputs.files }}
 
-      - name: Run step if any file(s) in the docs folder change
-        if: steps.changed-files-specific.outputs.any_changed == 'true'
-        run: echo "files changed"
+      - name: Fail the job if nothing is changed
+        if: steps.changed-files-specific.outputs.any_changed != 'true'
+        run: |
+          echo "nothing changed"
+          exit 1