Bump cirrus-actions/rebase from 1.6 to 1.7 (JuliaLang#505)

Bumps [cirrus-actions/rebase](https://github.com/cirrus-actions/rebase) from 1.6 to 1.7.
- [Release notes](https://github.com/cirrus-actions/rebase/releases)
- [Commits](cirrus-actions/rebase@99b0226...6e572f0)

---
updated-dependencies:
- dependency-name: cirrus-actions/rebase
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/auto-rebase.yml

@@ -10,6 +10,6 @@ jobs:
     steps:
     - uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b
     - name: Automatic Rebase
-      uses: cirrus-actions/rebase@99b0226479c59e6a40092b8afe704aabc61dec09
+      uses: cirrus-actions/rebase@6e572f08c244e2f04f9beb85a943eb618218714d
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}