Update wiki.yml

Author: coisa

.github/workflows/wiki.yml

@@ -52,7 +52,9 @@ jobs:
             -   name: Check if there are changes
                 id: changes
                 run: |
-                    if [ -n "$(git status -s)" ]; then
+                    git add .
+                    
+                    if git diff --cached --quiet; then
                       echo "changed=true" >> $GITHUB_OUTPUT
                     else
                       echo "changed=false" >> $GITHUB_OUTPUT
@@ -61,7 +63,6 @@ jobs:
             -   name: Add and commit files
                 if: steps.changes.outputs.changed == 'true'
                 run: |
-                    git add .
                     git config --global user.email "github-actions[bot]@users.noreply.github.com"
                     git config --global user.name "github-actions[bot]"
                     git commit -m "Update submodules at $(date "+DATE: %Y-%m-%d TIME: %H:%M:%S")"