Bump linear-b/gitstream-github-action from 1 to 2 (#2159)

Bumps [linear-b/gitstream-github-action](https://github.com/linear-b/gitstream-github-action) from 1 to 2.
- [Release notes](https://github.com/linear-b/gitstream-github-action/releases)
- [Commits](linear-b/gitstream-github-action@v1...v2)

---
updated-dependencies:
- dependency-name: linear-b/gitstream-github-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/gitstream.yml

@@ -37,7 +37,7 @@ jobs:
     name: gitStream workflow automation
     steps:
       - name: Evaluate Rules
-        uses: linear-b/gitstream-github-action@v1
+        uses: linear-b/gitstream-github-action@v2
         id: rules-engine
         with:
           full_repository: ${{ github.event.inputs.full_repository }}