Update pypa/gh-action-pypi-publish action to v1.8.1 (#127)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[pypa/gh-action-pypi-publish](https://togithub.com/pypa/gh-action-pypi-publish)
| action | minor | `v1.6.4` -> `v1.8.1` |

---

### Release Notes

<details>
<summary>pypa/gh-action-pypi-publish</summary>

###
[`v1.8.1`](https://togithub.com/pypa/gh-action-pypi-publish/releases/tag/v1.8.1)

[Compare
Source](https://togithub.com/pypa/gh-action-pypi-publish/compare/v1.8.0...v1.8.1)

##### 🐛 What's Fixed

💔 Unfortunately, a tiny mistake in v1.8.0 caused a far-reaching
regression for the most used code path.
❗ But don't worry, it's fixed now thanks to
[@&#8203;njzjz](https://togithub.com/njzjz) who promptly spotted it and
[@&#8203;zhongjiajie](https://togithub.com/zhongjiajie) who sent a
bugfix.

##### 🙌 New Contributors

- [@&#8203;zhongjiajie](https://togithub.com/zhongjiajie) made their
first contribution in
[https://github.com/pypa/gh-action-pypi-publish/pull/131](https://togithub.com/pypa/gh-action-pypi-publish/pull/131)

**Full Diff**:
pypa/gh-action-pypi-publish@v1.8.0...v1.8.1

###
[`v1.8.0`](https://togithub.com/pypa/gh-action-pypi-publish/releases/tag/v1.8.0)

[Compare
Source](https://togithub.com/pypa/gh-action-pypi-publish/compare/v1.7.1...v1.8.0)

##### The Coolest Release Ever!

In this release, [@&#8203;woodruffw](https://togithub.com/woodruffw)
implemented support for secretless OIDC-based publishing to PyPI-like
package indexes. The OIDC flow is activated when neither username nor
password action inputs are set.

The OIDC “token exchange”, is an authentication technique that PyPI (and
TestPyPI, and hopefully some future others) supports as an alternative
to long-lived username/password combinations or long-lived API tokens.

> **IMPORTANT:** The PyPI-side configuration is only available to
participants of the private beta test. Please, only try out the
zero-config mode if you are a beta test participant having followed the
PyPI configuration instructions.

Setup prerequisites:
https://github.com/marketplace/actions/pypi-publish#publishing-with-openid-connect
PyPI's documentation: https://pypi.org/help/#openid-connect
Beta test enrollment:
[https://github.com/pypi/warehouse/issues/12965](https://togithub.com/pypi/warehouse/issues/12965)

##### New Contributors

- [@&#8203;woodruffw](https://togithub.com/woodruffw) made their first
contribution in
[https://github.com/pypa/gh-action-pypi-publish/pull/123](https://togithub.com/pypa/gh-action-pypi-publish/pull/123)

**Full Diff**:
pypa/gh-action-pypi-publish@v1.7.1...v1.8.0

###
[`v1.7.1`](https://togithub.com/pypa/gh-action-pypi-publish/releases/tag/v1.7.1)

[Compare
Source](https://togithub.com/pypa/gh-action-pypi-publish/compare/v1.7.0...v1.7.1)

#### Regression?

There was a small setback with v1.7.0 — the snake_case fallbacks didn't
work because the check for the kebab-case env vars with default values
set was always truthy. This bugfix release promptly fixes that.

**Full Diff**:
pypa/gh-action-pypi-publish@v1.7.0...v1.7.1

###
[`v1.7.0`](https://togithub.com/pypa/gh-action-pypi-publish/releases/tag/v1.7.0)

[Compare
Source](https://togithub.com/pypa/gh-action-pypi-publish/compare/v1.6.5...v1.7.0)

#### What should I care about?

TL;DR The action input names have been converted to use kebab-case and
marked deprecated. But the old names still work.

This is made to align the public API with the de-facto conventions in
the ecosystem. We've used snake_case names, which the maintainer
considers a historical mistake. New kebab-case inputs will make the
end-users' workflows look more consistent and and visually
distinguishable from other identifiers one may encounter in YAML.

There is no timeline for removing the old names, but it will happen in
v3 or later versions of the action. *If the maintainer doesn't forget to
do this, that is.*

The patch is here:
[https://github.com/pypa/gh-action-pypi-publish/pull/125](https://togithub.com/pypa/gh-action-pypi-publish/pull/125).

**Full Diff**:
pypa/gh-action-pypi-publish@v1.6.5...v1.7.0

###
[`v1.6.5`](https://togithub.com/pypa/gh-action-pypi-publish/releases/tag/v1.6.5)

[Compare
Source](https://togithub.com/pypa/gh-action-pypi-publish/compare/v1.6.4...v1.6.5)

#### What's Changed

- Added an explicit warning when the password passed into the action is
empty — thanks [@&#8203;colindean](https://togithub.com/colindean)

#### New Contributors

- [@&#8203;colindean](https://togithub.com/colindean) made their first
contribution in
[https://github.com/pypa/gh-action-pypi-publish/pull/122](https://togithub.com/pypa/gh-action-pypi-publish/pull/122)

**Full Diff**:
pypa/gh-action-pypi-publish@v1.6.4...v1.6.5

</details>

---

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---

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.github/workflows/python-publish.yaml

@@ -26,7 +26,7 @@ jobs:
     - name: Build package
       run: python -m build
     - name: Publish package
-      uses: pypa/gh-action-pypi-publish@v1.6.4
+      uses: pypa/gh-action-pypi-publish@v1.8.1
       with:
         user: __token__
         password: ${{ secrets.PYPI_API_TOKEN }}