Bumps pyinstaller from 6.21.0 to 6.22.0.

Sourced from pyinstaller's releases.

v6.22.0

Please see the v6.22.0 section of the changelog for a list of the changes since v6.21.0.

Sourced from pyinstaller's changelog.

6.22.0 (2026-08-08)

Features

* Implement support for Tcl/Tk 9 builds with embedded data archives in
  ``tkinter`` hooks and the splash screen. Tcl/Tk 9 with embedded data
  is used, for example, in python.org Windows builds of Python 3.15.0b3.
  (:issue:`9470`)
* Use portable path separators (always forward slashes) in generated spec files.
  (:issue:`8004`)
Bugfix
* (Linux) Fix regression that prevented automatic collection of Wayland
  shared libraries that are bundled with ``pywayland`` binary wheels.
  (:issue:`9430`)
* Fix :class:`ValueError` build error on Windows if :option:`--specpath` is set
  to a different drive. (:issue:`8116`)
* Fix backslash mishandling of some CLI options (``--contents-directory``,
  ``--resource``). (:issue:`9472`)
Hooks
* Add hooks for ``gi.repository.Soup`` and ``gi.repository.Spelling``.
  (:issue:`9491`)
* Rework the standard and run-time hook for ``_tkinter`` so that error
  about missing Tcl/Tk data directories is raised at build time rather
  than at run time. (:issue:`9470`)
* Update the ``matplotlib.backends`` hook to automatically collect dist
  metadata for backends that are discovered via ``matplotlib.backend``
  entry point (Matplotlib >= 3.9). (:issue:`9469`)
* Update the ``matplotlib.backends`` hook to obtain the list of available
  Matplotlib backends from the new backends registry, if available
  (Matplotlib >= 3.9). Fixes compatibility with Matplotlib >= 3.11, which
  removed the old list of available backends that was superseded by the
  backends registry. (:issue:`9467`)
</code></pre>
</blockquote>
</details>
<details>
<summary>Commits</summary>

<ul>
<li><a href="https://github.com/pyinstaller/pyinstaller/commit/70fc17210920bce17f4ab09bbf8104b0dbd45338"><code>70fc172</code></a> Release v6.22.0. [skip ci]</li>
<li><a href="https://github.com/pyinstaller/pyinstaller/commit/138ae1bfe09c21c22f9ed6c847a55026505a94e1"><code>138ae1b</code></a> doc: update yapf version under Coding conventions [skip ci]</li>
<li><a href="https://github.com/pyinstaller/pyinstaller/commit/5b38ee9c5d1bfbe6da7df8559084f6bbd3272b32"><code>5b38ee9</code></a> Tests: Requirements: Scheduled weekly dependency update for week 31 (<a href="https://redirect.github.com/pyinstaller/pyinstaller/issues/9494">#9494</a>)</li>
<li><a href="https://github.com/pyinstaller/pyinstaller/commit/9fdf5162a2cc2c8f2a4d2a13f78b498a35a1c106"><code>9fdf516</code></a> hooks: Add hooks for libsoup and libspelling (gi.repository) (<a href="https://redirect.github.com/pyinstaller/pyinstaller/issues/9491">#9491</a>)</li>
<li><a href="https://github.com/pyinstaller/pyinstaller/commit/8af799925260c4ea606b1e9235409891c1abbd84"><code>8af7999</code></a> rthooks: gstreamer: fix plugin directory name in GST_PLUGIN_PATH (<a href="https://redirect.github.com/pyinstaller/pyinstaller/issues/9490">#9490</a>)</li>
<li><a href="https://github.com/pyinstaller/pyinstaller/commit/2343e0e94e014094b3b4dfa1b9a70e0cc1257e53"><code>2343e0e</code></a> makespec: Use portable path separators.</li>
<li><a href="https://github.com/pyinstaller/pyinstaller/commit/ece7422f7ec49f02cbc3f7100cd5dd77226469b4"><code>ece7422</code></a> Fix ValueError on Windows if --specpath points to a different drive</li>
<li><a href="https://github.com/pyinstaller/pyinstaller/commit/08116e0ce0c1fc7e37d373d1867e17b3ecab0bc8"><code>08116e0</code></a> makespec: Remove <em>variable path</em> substitution.</li>
<li><a href="https://github.com/pyinstaller/pyinstaller/commit/fa9f57ae9821068f82948e65943c5e4667436e2a"><code>fa9f57a</code></a> Tests: Requirements: Scheduled weekly dependency update for week 30 (<a href="https://redirect.github.com/pyinstaller/pyinstaller/issues/9489">#9489</a>)</li>
<li><a href="https://github.com/pyinstaller/pyinstaller/commit/3e85744ba8f7f550ec51c8b4412af03ebf5c0694"><code>3e85744</code></a> Tests: Requirements: Scheduled weekly dependency update for week 29 (<a href="https://redirect.github.com/pyinstaller/pyinstaller/issues/9486">#9486</a>)</li>
<li>Additional commits viewable in <a href="https://github.com/pyinstaller/pyinstaller/compare/v6.21.0...v6.22.0">compare view</a></li>
</ul>
</details>

&lt;br /&gt;</code></pre>


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