GitHub Action: Bump actions/create-github-app-token from 1 to 2

Bumps [actions/create-github-app-token](https://github.com/actions/create-github-app-token) from 1 to 2.
- [Release notes](https://github.com/actions/create-github-app-token/releases)
- [Commits](https://github.com/actions/create-github-app-token/compare/v1...v2)

---
updated-dependencies:
- dependency-name: actions/create-github-app-token
  dependency-version: '2'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/request-reviews.yml

diff --git a/.github/workflows/request-reviews.yml b/.github/workflows/request-reviews.yml
index e5db19c..d04901d 100644
--- a/.github/workflows/request-reviews.yml
+++ b/.github/workflows/request-reviews.yml
@@ -34,7 +34,7 @@
     steps:

       - name: Generate Token

         id: generate-token

-        uses: actions/create-github-app-token@v1

+        uses: actions/create-github-app-token@v2

         with:

           app-id: ${{ secrets.TIANOCORE_ASSIGN_REVIEWERS_APPLICATION_ID }}

           private-key: ${{ secrets.TIANOCORE_ASSIGN_REVIEWERS_APPLICATION_PRIVATE_KEY }}