build(deps-dev): bump poetry from 1.5.0 to 1.5.1 (#2422)

Bumps [poetry](https://github.com/python-poetry/poetry) from 1.5.0 to 1.5.1.
- [Release notes](https://github.com/python-poetry/poetry/releases)
- [Changelog](https://github.com/python-poetry/poetry/blob/master/CHANGELOG.md)
- [Commits](python-poetry/poetry@1.5.0...1.5.1)

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

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

devtools/requirements-poetry.in

@@ -1,3 +1,3 @@
 # Fixing this here as readthedocs can't use the compiled requirements-poetry.txt
 # due to conflicts.
-poetry==1.5.0
+poetry==1.5.1