Bump poetry from 1.1.14 to 1.1.15 in /.github/workflows

Bumps [poetry](https://github.com/python-poetry/poetry) from 1.1.14 to 1.1.15.
- [Release notes](https://github.com/python-poetry/poetry/releases)
- [Changelog](https://github.com/python-poetry/poetry/blob/1.1.15/CHANGELOG.md)
- [Commits](python-poetry/poetry@1.1.14...1.1.15)

---
updated-dependencies:
- dependency-name: poetry
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.github/workflows/constraints.txt

@@ -1,5 +1,5 @@
 pip==22.2.2
 nox==2022.8.7
 nox-poetry==1.0.1
-poetry==1.1.14
+poetry==1.1.15
 virtualenv==20.16.3