build(deps): 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](actions/create-github-app-token@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>

Author: dependabot[bot]

.github/workflows/sync-git-gui.yml

@@ -113,7 +113,7 @@ jobs:
             core.setOutput('to-fetch', [...toFetch].join(' '))
       - name: obtain installation token
         if: steps.check.outputs.refspec != ''
-        uses: actions/create-github-app-token@v1
+        uses: actions/create-github-app-token@v2
         id: token
         with:
           app-id: ${{ secrets.GITGITGADGET_GITHUB_APP_ID }}

.github/workflows/sync-gitster-git.yml

@@ -99,7 +99,7 @@ jobs:
             core.setOutput('to-fetch', [...toFetch].join(' '))
       - name: obtain installation token
         if: steps.check.outputs.refspec != ''
-        uses: actions/create-github-app-token@v1
+        uses: actions/create-github-app-token@v2
         id: token
         with:
           app-id: ${{ secrets.GITGITGADGET_GITHUB_APP_ID }}

.github/workflows/sync-ref.yml

@@ -64,7 +64,7 @@ jobs:
             core.setOutput('target-sha', targetSHA || '')
       - name: obtain installation token
         if: steps.check.outputs.skip == 'false'
-        uses: actions/create-github-app-token@v1
+        uses: actions/create-github-app-token@v2
         id: token
         with:
           app-id: ${{ secrets.GITGITGADGET_GITHUB_APP_ID }}