Bump poetry from 1.1.0 to 1.1.1 in /.github/workflows

Bumps [poetry](https://github.com/python-poetry/poetry) from 1.1.0 to 1.1.1.
- [Release notes](https://github.com/python-poetry/poetry/releases)
- [Changelog](https://github.com/python-poetry/poetry/blob/1.1.1/CHANGELOG.md)
- [Commits](python-poetry/poetry@1.1.0...1.1.1)

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/constraints.txt

@@ -1,2 +1,2 @@
 pip==20.2.3
-poetry==1.1.0
+poetry==1.1.1