build(deps): bump smallvec from 1.14.0 to 1.15.0 (servo#36387)

Bumps [smallvec](https://github.com/servo/rust-smallvec) from 1.14.0 to
1.15.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/servo/rust-smallvec/releases">smallvec's
releases</a>.</em></p>
<blockquote>
<h2>v1.15.0</h2>
<h2>What's Changed</h2>
<ul>
<li>Fix typos by <a
href="https://github.com/waywardmonkeys"><code>@​waywardmonkeys</code></a>
in <a
href="https://redirect.github.com/servo/rust-smallvec/pull/373">servo/rust-smallvec#373</a></li>
<li>Implement bincode2 encode/decode support for smallvec v1 by <a
href="https://github.com/markbt"><code>@​markbt</code></a> in <a
href="https://redirect.github.com/servo/rust-smallvec/pull/375">servo/rust-smallvec#375</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a href="https://github.com/markbt"><code>@​markbt</code></a> made
their first contribution in <a
href="https://redirect.github.com/servo/rust-smallvec/pull/375">servo/rust-smallvec#375</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/servo/rust-smallvec/compare/v1.14.0...v1.15.0">https://github.com/servo/rust-smallvec/compare/v1.14.0...v1.15.0</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/servo/rust-smallvec/commit/7c4d350f5ec284fd05807f1a182387889a62af24"><code>7c4d350</code></a>
Versoin 1.15.0</li>
<li><a
href="https://github.com/servo/rust-smallvec/commit/aeceb0a5b1fde6bb2ea58afff46749d2c23bc918"><code>aeceb0a</code></a>
Temporarily disable broken fuzzing in CI</li>
<li><a
href="https://github.com/servo/rust-smallvec/commit/a2fb430411f3de5d5b83b8cf9bcac418beac6f81"><code>a2fb430</code></a>
Pin honggfuzz binary version</li>
<li><a
href="https://github.com/servo/rust-smallvec/commit/35e7ffeedef2414cb4a77c0438c9943d457d970d"><code>35e7ffe</code></a>
Add support for bincode encode and decode</li>
<li><a
href="https://github.com/servo/rust-smallvec/commit/0d019cd54a7b89293ccb5906f019096e65e8cc36"><code>0d019cd</code></a>
Rename bincode dev-dependency to bincode1</li>
<li><a
href="https://github.com/servo/rust-smallvec/commit/6c8751df6a19380cc33204d8d0851d4375f95644"><code>6c8751d</code></a>
Merge pull request <a
href="https://redirect.github.com/servo/rust-smallvec/issues/373">#373</a>
from waywardmonkeys/v1-fix-typos</li>
<li><a
href="https://github.com/servo/rust-smallvec/commit/36317fa17f661010609f27751a1888e946f83cb5"><code>36317fa</code></a>
Fix typos</li>
<li>See full diff in <a
href="https://github.com/servo/rust-smallvec/compare/v1.14.0...v1.15.0">compare
view</a></li>
</ul>
</details>
<br />


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Cargo.lock

@@ -127,7 +127,7 @@ servo-media-dummy = { git = "https://github.com/servo/media" }
 servo-media-gstreamer = { git = "https://github.com/servo/media" }
 servo_arc = { git = "https://github.com/servo/stylo", branch = "2025-03-15" }
 smallbitvec = "2.6.0"
-smallvec = "1.14"
+smallvec = "1.15"
 static_assertions = "1.1"
 string_cache = "0.8"
 string_cache_codegen = "0.5"