Fix error in publish docs workflow check

The previos fix would always skip publishing. This sets an environmental output
in the commit files stage that can be checked before pushing changes.

Signed-off-by: Winford <[email protected]>

.github/workflows/publish-docs.yaml

@@ -113,6 +113,7 @@ jobs:
           make GitHub_CI_Publish_Docs
 
       - name: Commit files
+        id: commit_files
         if: github.repository == 'atomvm/AtomVM'
         working-directory: /home/runner/work/AtomVM/AtomVM/www
         run: |
@@ -122,17 +123,16 @@ jobs:
           if [ -n "$(git status --porcelain=v1)" ]; then
             git add .
             git commit -m "Update Documentation"
+            echo "PUBLISH=true" >> "$GITHUB_OUTPUT"
           fi
       - name: Push changes
-        if: github.repository == 'atomvm/AtomVM'
+        if: github.repository == 'atomvm/AtomVM' && steps.commit_files.outputs.PUBLISH  == 'true'
         working-directory: /home/runner/work/AtomVM/AtomVM/www
         run: |
-          if [ -n "$(git status --porcelain=v1)" ]; then
-            eval `ssh-agent -t 60 -s`
-            echo "${{ secrets.PUBLISH_ACTION_KEY }}" | ssh-add -
-            mkdir -p ~/.ssh/
-            ssh-keyscan github.com >> ~/.ssh/known_hosts
-            git remote add push_dest "[email protected]:atomvm/atomvm_www.git"
-            git fetch push_dest
-            git push --set-upstream push_dest Production
-          fi
+          eval `ssh-agent -t 60 -s`
+          echo "${{ secrets.PUBLISH_ACTION_KEY }}" | ssh-add -
+          mkdir -p ~/.ssh/
+          ssh-keyscan github.com >> ~/.ssh/known_hosts
+          git remote add push_dest "[email protected]:atomvm/atomvm_www.git"
+          git fetch push_dest
+          git push --set-upstream push_dest Production