ci: Ensure workflows run on update flagsmith environment PRs (#6957)

Author: matthewelwell

.github/workflows/update-flagsmith-environment.yml

@@ -33,10 +33,10 @@ jobs:
         run: poetry run python manage.py updateflagsmithenvironment
 
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v5
+        uses: peter-evans/create-pull-request@v8
         with:
           commit-message: Update API Flagsmith Defaults
-          branch: chore/update-api-flagsmith-environment
           delete-branch: true
-          title: 'chore: update Flagsmith environment document'
+          title: 'chore: Update Flagsmith environment document'
           labels: api
+          token: ${{ secrets.UPDATE_ENVIRONMENT_DOCUMENT_WORKFLOW_GH_PAT }}