Bump poetry from 1.1.6 to 1.1.7 in /.github/workflows (#336)

Bumps [poetry](https://github.com/python-poetry/poetry) from 1.1.6 to 1.1.7.
- [Release notes](https://github.com/python-poetry/poetry/releases)
- [Changelog](https://github.com/python-poetry/poetry/blob/1.1.7/CHANGELOG.md)
- [Commits](python-poetry/poetry@1.1.6...1.1.7)

---
updated-dependencies:
- dependency-name: poetry
  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>

.github/workflows/requirements.txt

@@ -1,2 +1,2 @@
 pip==21.1.3
-poetry==1.1.6
+poetry==1.1.7