DNM: check out npm branch on pull request

Author: caugner

.github/workflows/pr-check_redirects.yml

@@ -39,6 +39,7 @@ jobs:
           repository: mdn/content
           path: mdn/content
           persist-credentials: false
+          ref: npm # TODO Remove before merge
 
       - name: Setup Node.js environment
         if: steps.filter.outputs.required_files == 'true'

.github/workflows/pr-test.yml

@@ -84,6 +84,7 @@ jobs:
           repository: mdn/content
           path: mdn/content
           persist-credentials: false
+          ref: npm # TODO Remove before merge
 
       - name: Setup Node.js environment
         if: steps.check.outputs.HAS_FILES == 'true'