Bump poetry from 1.1.2 to 1.1.4 in /.github/workflows

Bumps [poetry](https://github.com/python-poetry/poetry) from 1.1.2 to 1.1.4.
- [Release notes](https://github.com/python-poetry/poetry/releases)
- [Changelog](https://github.com/python-poetry/poetry/blob/master/CHANGELOG.md)
- [Commits](python-poetry/poetry@1.1.2...1.1.4)

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

.github/workflows/constraints.txt

@@ -1,5 +1,5 @@
 pip==20.2.4
 nox==2020.8.22
 nox-poetry==0.5.0
-poetry==1.1.2
+poetry==1.1.4
 virtualenv==20.1.0