[CI] Update update-psalm-baseline workflow to solve warnings

This updates the PR action to v4, which solves warnings about deprecated Node.js 12 actions set-output commmand calls.

Signed-off-by: MichaIng <micha@dietpi.com>

.github/workflows/update-psalm-baseline.yml

@@ -48,7 +48,7 @@ jobs:
           git checkout composer.json composer.lock lib/composer
 
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v3
+        uses: peter-evans/create-pull-request@v4
         with:
           token: ${{ secrets.COMMAND_BOT_PAT }}
           commit-message: Update psalm baseline