Update dependency pdoc to v15 (#465)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [pdoc](https://redirect.github.com/mitmproxy/pdoc) | `==14.7.0` ->
`==15.0.0` |
[![age](https://developer.mend.io/api/mc/badges/age/pypi/pdoc/15.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/pypi/pdoc/15.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/pypi/pdoc/14.7.0/15.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/pdoc/14.7.0/15.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>mitmproxy/pdoc (pdoc)</summary>

###
[`v15.0.0`](https://redirect.github.com/mitmproxy/pdoc/blob/HEAD/CHANGELOG.md#2024-10-11-pdoc-1500)

[Compare
Source](https://redirect.github.com/mitmproxy/pdoc/compare/v14.7.0...v15.0.0)

- Remove support for Python 3.8, which has reached end-of-life on
2024-10-07.
([#&#8203;747](https://redirect.github.com/mitmproxy/pdoc/pull/747),
[@&#8203;mhils](https://redirect.github.com/mhils))
- Inherited members are now hidden by default if the base class is not
part of the documentation.
    Please provide feedback in the PR if you relied on the old behavior.
([#&#8203;748](https://redirect.github.com/mitmproxy/pdoc/pull/748),
[@&#8203;mhils](https://redirect.github.com/mhils))
- Python 3.13: `@deprecated` decorators are now rendered with visual
emphasis.
([#&#8203;750](https://redirect.github.com/mitmproxy/pdoc/pull/750),
[@&#8203;mhils](https://redirect.github.com/mhils))
- Improve mocking of `sys.stdin`, `sys.stdout`, and `sys.stderr` to fix
runtime errors with some packages.
([#&#8203;751](https://redirect.github.com/mitmproxy/pdoc/pull/751),
[@&#8203;mhils](https://redirect.github.com/mhils))

</details>

---

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---

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---

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requirements_dev.txt

@@ -2,7 +2,7 @@
 black==24.10.0
 coverage==7.6.2
 mypy==1.11.2
-pdoc==14.7.0
+pdoc==15.0.0
 pip==24.2
 pre-commit==4.0.1
 pytest-cov==5.0.0