Bump pdm from 2.5.4 to 2.6.1

Bumps [pdm](https://github.com/pdm-project/pdm) from 2.5.4 to 2.6.1.
- [Release notes](https://github.com/pdm-project/pdm/releases)
- [Changelog](https://github.com/pdm-project/pdm/blob/main/CHANGELOG.md)
- [Commits](pdm-project/pdm@2.5.4...2.6.1)

---
updated-dependencies:
- dependency-name: pdm
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pyproject.toml

@@ -243,7 +243,7 @@ dev = [
     "freezegun==1.2.2",
     "furo==2023.3.27",
     "mypy==1.3.0",
-    "pdm==2.5.4",
+    "pdm==2.6.1",
     "pip_check_reqs==2.4.4",
     "pydocstyle==6.3.0  ",
     "pyenchant==3.2.2 ",