Update peter-evans/create-pull-request action to v8

Author: renovate[bot]

.github/workflows/locale_po_to_json.yaml

@@ -42,7 +42,7 @@ jobs:
     - name: Run app:locale:po_to_json
       run: bundle exec rake app:locale:po_to_json
     - name: Create Pull Request
-      uses: peter-evans/create-pull-request@v7
+      uses: peter-evans/create-pull-request@v8
       with:
         add-paths: app/javascript/oldjs/locale
         commit-message: Update UI json translation files

.github/workflows/yarn_lock.yaml

@@ -29,7 +29,7 @@ jobs:
         yarn install
         git diff
     - name: Create Pull Request
-      uses: peter-evans/create-pull-request@v7
+      uses: peter-evans/create-pull-request@v8
       with:
         add-paths: yarn.lock
         commit-message: Update yarn.lock with latest dependencies