Update EA cloning script to rely on the current git branch

.github/workflows/test.yml

@@ -77,6 +77,7 @@ jobs:
         run: npm run heroku-postbuild
         env:
           DOCUBOT_REPO_PAT: ${{ secrets.DOCUBOT_REPO_PAT }}
+          GIT_BRANCH: ${{ github.ref }}
 
       - name: Run build script
         if: ${{ github.repository != 'github/docs-internal' and needs.see_if_should_skip.outputs.should_skip != 'true'}}