Update dependency pdm to v2.21.0 (#209)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [pdm](https://redirect.github.com/pdm-project/pdm)
([changelog](https://pdm-project.org/latest/dev/changelog/)) | minor |
`==2.20.1` -> `==2.21.0` |

---

### Release Notes

<details>
<summary>pdm-project/pdm (pdm)</summary>

###
[`v2.21.0`](https://redirect.github.com/pdm-project/pdm/blob/HEAD/CHANGELOG.md#Release-v2210-2024-11-25)

[Compare
Source](https://redirect.github.com/pdm-project/pdm/compare/2.20.1...2.21.0)

##### Features & Improvements

- Pass original working directory as env variable to pdm scripts
([#&#8203;3179](https://redirect.github.com/pdm-project/pdm/issues/3179))
- Output similar commands or script command when the input command is
not correct
([#&#8203;3270](https://redirect.github.com/pdm-project/pdm/issues/3270))
- improve readability of Python interpreter validation message
([#&#8203;3276](https://redirect.github.com/pdm-project/pdm/issues/3276))
- Print task name by default when using `pdm run`
([#&#8203;3277](https://redirect.github.com/pdm-project/pdm/issues/3277))
- Make `OrderedSet.__contains__` run in O(1)
([#&#8203;3280](https://redirect.github.com/pdm-project/pdm/issues/3280))
- Emit `post_lock` after writing pyproject.toml and pdm.lock in
add/update
([#&#8203;3285](https://redirect.github.com/pdm-project/pdm/issues/3285))
- Drop support of Python 3.8
([#&#8203;3298](https://redirect.github.com/pdm-project/pdm/issues/3298))

##### Bug Fixes

- Fix the name normalization issue for optional dependency groups.
([#&#8203;3271](https://redirect.github.com/pdm-project/pdm/issues/3271))
- Don't use uv when installing plugins in project.
([#&#8203;3283](https://redirect.github.com/pdm-project/pdm/issues/3283))
- Fix the bug that pdm plugins are invalid after installation on ubuntu
system python.
([#&#8203;3289](https://redirect.github.com/pdm-project/pdm/issues/3289))

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Renovate
Bot](https://redirect.github.com/renovatebot/renovate).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS40NC4wIiwidXBkYXRlZEluVmVyIjoiMzkuNDQuMCIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOltdfQ==-->

requirements.txt

@@ -1,5 +1,5 @@
 cruft==2.15.0
 mex-release==0.3.0
-pdm==2.20.1
+pdm==2.21.0
 pre-commit==4.0.1
 wheel==0.45.1