updated to use Github env variables due to action warning deprecating…

… use of set-output

.github/workflows/update-zarf-injector.yaml

@@ -43,14 +43,14 @@ jobs:
         run: |
           if git diff --quiet; then
             echo "No changes detected."
-            echo "::set-output name=changes::false"
+            echo "changes=false" >> $GITHUB_ENV
           else
             echo "Changes detected."
-            echo "::set-output name=changes::true"
+            echo "changes=true" >> $GITHUB_ENV
           fi
 
       - name: Commit and push changes
-        if: steps.git_status.outputs.changes == 'true'
+        if: env.changes == 'true'
         run: |
           git config --global user.email "github-actions[bot]@users.noreply.github.com"
           git config --global user.name "GitHub Actions Bot"