chore: update github token used in workflows (#3424)

---

By submitting this pull request, I confirm that my contribution is made under the terms of the [Apache 2.0 license].

[Apache 2.0 license]: https://www.apache.org/licenses/LICENSE-2.0

Author: corymhall

.github/workflows/gh-pages.yml

@@ -61,7 +61,7 @@ jobs:
         uses: actions/checkout@v3
         with:
           ref: gh-pages
-          token: ${{ secrets.AUTO_APPROVE_GITHUB_TOKEN }}
+          token: ${{ secrets.PROJEN_GITHUB_TOKEN }}
       - name: Download Artifact
         uses: actions/download-artifact@v2
         with:

.github/workflows/pr-labeler.yml

@@ -16,4 +16,4 @@ jobs:
     steps:
     - run: gh pr edit ${{ github.event.pull_request.number }} --add-label "auto-approve" -R ${{ github.repository }}
       env:
-        GITHUB_TOKEN: ${{ secrets.AUTO_APPROVE_GITHUB_TOKEN }}
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/yarn-upgrade.yml

@@ -143,5 +143,5 @@ jobs:
           labels: contribution/core,dependencies,auto-approve
           team-reviewers: aws-cdk-team
           # Privileged token so automated PR validation happens
-          token: ${{ secrets.AUTO_APPROVE_GITHUB_TOKEN }}
+          token: ${{ secrets.PROJEN_GITHUB_TOKEN }}