Fix missing Get App Token step in release workflow

Missed in previous upstream merge.

Author: myabc

.github/workflows/release.yml

@@ -75,6 +75,16 @@ jobs:
           npm ci
           bundle install
 
+      # Use the primer GitHub App for authentication.
+      # See: https://github.com/organizations/primer/settings/apps/primer
+      - name: Get App Token
+        uses: actions/create-github-app-token@v2
+        id: get-access-token
+        with:
+          app-id: ${{ vars.PRIMER_APP_ID_SHARED }}
+          owner: opf
+          private-key: ${{ secrets.PRIMER_APP_PRIVATE_KEY_SHARED }}
+
       - name: Create release pull request or publish to npm
         id: changesets
         uses: changesets/action@v1.4.10
@@ -99,4 +109,4 @@ jobs:
     if: ${{ github.repository == 'opf/primer_view_components' && github.ref_name == 'changeset-release/main' && github.event_name == 'push' }}
     uses: ./.github/workflows/release_candidate.yml
     secrets:
-      gh_token: ${{ secrets.GITHUB_TOKEN }}
+      gh_token: ${{ secrets.GITHUB_TOKEN }}