Bump styfle/cancel-workflow-action from 0.9.0 to 0.9.1 (#678)

Bumps [styfle/cancel-workflow-action](https://github.com/styfle/cancel-workflow-action) from 0.9.0 to 0.9.1.
- [Release notes](https://github.com/styfle/cancel-workflow-action/releases)
- [Commits](styfle/cancel-workflow-action@0.9.0...0.9.1)

---
updated-dependencies:
- dependency-name: styfle/cancel-workflow-action
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.github/workflows/unittests.yml

@@ -57,7 +57,7 @@ jobs:
     if: "!contains(github.event.head_commit.message, 'ci-skip')"
     steps:
       - name: Cancel Outdated Runs
-        uses: styfle/cancel-workflow-action@0.9.0
+        uses: styfle/cancel-workflow-action@0.9.1
         with:
           access_token: ${{ github.token }}
       - uses: actions/checkout@v2