Bump auth-git2 from 0.5.7 to 0.5.8 (#2091)

Bumps [auth-git2](https://github.com/de-vri-es/auth-git2-rs) from 0.5.7
to 0.5.8.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/de-vri-es/auth-git2-rs/blob/main/CHANGELOG">auth-git2's
changelog</a>.</em></p>
<blockquote>
<h1>Version 0.5.8 - 2025-05-23</h1>
<ul>
<li>[fix][minor] Fix loading of default ECDSA key.</li>
<li>[add][patch] Log a warning when processing a private key in unknown
format.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/de-vri-es/auth-git2-rs/commit/3ba94e6efe2c59a4ffd2e6beb4bc96e958998979"><code>3ba94e6</code></a>
Bump version to 0.5.8.</li>
<li><a
href="https://github.com/de-vri-es/auth-git2-rs/commit/84bff8473207648a395b5aff72ccf59cb5faae35"><code>84bff84</code></a>
Remove unused <code>ClonePrompter::as_prompter()</code>.</li>
<li><a
href="https://github.com/de-vri-es/auth-git2-rs/commit/0dd72128fbb6a7402f9b95ad4b25b861342b02ba"><code>0dd7212</code></a>
Log a warning on unknown private key format.</li>
<li><a
href="https://github.com/de-vri-es/auth-git2-rs/commit/19ef4cfc2488ac0064cd0ad5ff29bddeb49d2bed"><code>19ef4cf</code></a>
Remove unused UTF-8 error details.</li>
<li><a
href="https://github.com/de-vri-es/auth-git2-rs/commit/c5c5c051e8c3792bb7990b8ecf8820b865f1ec26"><code>c5c5c05</code></a>
Update CHANGELOG.</li>
<li><a
href="https://github.com/de-vri-es/auth-git2-rs/commit/d6c3a6e7f558ea603101fc142721fda5be1c4f02"><code>d6c3a6e</code></a>
Merge pull request <a
href="https://redirect.github.com/de-vri-es/auth-git2-rs/issues/9">#9</a>
from Stiff-Rock/fix-id-ecdsa-comma</li>
<li><a
href="https://github.com/de-vri-es/auth-git2-rs/commit/518d3b3d4aeef18148a0385f88f5f546ab60d24f"><code>518d3b3</code></a>
fix: remove stray comma from id_ecdsa string in
add_default_ssh_keys</li>
<li>See full diff in <a
href="https://github.com/de-vri-es/auth-git2-rs/compare/v0.5.7...v0.5.8">compare
view</a></li>
</ul>
</details>
<br />


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