Bump nick-invision/retry from 2.8.3 to 2.9.0

Bumps [nick-invision/retry](https://github.com/nick-invision/retry) from 2.8.3 to 2.9.0.
- [Release notes](https://github.com/nick-invision/retry/releases)
- [Changelog](https://github.com/nick-fields/retry/blob/master/.releaserc.js)
- [Commits](nick-fields/retry@v2.8.3...v2.9.0)

---
updated-dependencies:
- dependency-name: nick-invision/retry
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/build.yml

@@ -33,7 +33,7 @@ jobs:
         run: |
           pip install ".[test]"
       - name: Build and install Jupyter Enterprise Gateway
-        uses: nick-invision/retry@v2.8.3
+        uses: nick-invision/retry@v2.9.0
         with:
           timeout_minutes: 10
           max_attempts: 2
@@ -43,7 +43,7 @@ jobs:
         run: |
           pip freeze
       - name: Run unit tests
-        uses: nick-invision/retry@v2.8.3
+        uses: nick-invision/retry@v2.9.0
         with:
           timeout_minutes: 3
           max_attempts: 1