Auto merge of #29578 - servo:dependabot/cargo/spin-0.9.8, r=mukilan

Bump spin from 0.9.5 to 0.9.8

Bumps [spin](https://github.com/mvdnes/spin-rs) from 0.9.5 to 0.9.8.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/mvdnes/spin-rs/blob/master/CHANGELOG.md">spin's changelog</a>.</em></p>
<blockquote>
<h1>[0.9.8] - 2023-04-03</h1>
<h3>Fixed</h3>
<ul>
<li>Unsoundness in <code>Once::try_call_once</code> caused by an <code>Err(_)</code> result</li>
</ul>
<h1>[0.9.7] - 2023-03-27</h1>
<h3>Fixed</h3>
<ul>
<li>Relaxed accidentally restricted <code>Send</code>/<code>Sync</code> bounds for <code>Mutex</code> guards</li>
</ul>
<h1>[0.9.6] - 2023-03-13</h1>
<h3>Fixed</h3>
<ul>
<li>Relaxed accidentally restricted <code>Send</code>/<code>Sync</code> bounds for <code>RwLock</code> guards</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li>See full diff in <a href="https://github.com/mvdnes/spin-rs/commits">compare view</a></li>
</ul>
</details>
<br />

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Cargo.lock

@@ -6120,9 +6120,9 @@ checksum = "b72d540d5c565dbe1f891d7e21ceb21d2649508306782f1066989fccb0b363d3"
 
 [[package]]
 name = "spin"
-version = "0.9.5"
+version = "0.9.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dccf47db1b41fa1573ed27ccf5e08e3ca771cb994f776668c5ebda893b248fc"
+checksum = "6980e8d7511241f8acf4aebddbb1ff938df5eebe98691418c4468d0b72a96a67"
 dependencies = [
  "lock_api",
 ]