ci: bump poetry-dynamic-versioning in /.github/workflows

Bumps [poetry-dynamic-versioning](https://github.com/mtkennerly/poetry-dynamic-versioning) from 1.9.0 to 1.9.1.
- [Release notes](https://github.com/mtkennerly/poetry-dynamic-versioning/releases)
- [Changelog](https://github.com/mtkennerly/poetry-dynamic-versioning/blob/master/CHANGELOG.md)
- [Commits](mtkennerly/poetry-dynamic-versioning@v1.9.0...v1.9.1)

---
updated-dependencies:
- dependency-name: poetry-dynamic-versioning
  dependency-version: 1.9.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/constraints.txt

@@ -3,5 +3,5 @@ nox==2025.5.1
 nox-poetry==1.2.0
 poetry==1.8.5
 virtualenv==20.31.2
-poetry-dynamic-versioning==1.9.0
+poetry-dynamic-versioning==1.9.1
 toml==0.10.2