build(deps): bump either from 1.13.0 to 1.15.0 in /rust (#8403)

Bumps [either](https://github.com/rayon-rs/either) from 1.13.0 to
1.15.0.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="59ae1fce0c"><code>59ae1fc</code></a>
Merge pull request <a
href="https://redirect.github.com/rayon-rs/either/issues/120">#120</a>
from cuviper/release-1.15.0</li>
<li><a
href="7f4bf0222d"><code>7f4bf02</code></a>
Release 1.15.0</li>
<li><a
href="56178e9fdb"><code>56178e9</code></a>
Merge pull request <a
href="https://redirect.github.com/rayon-rs/either/issues/119">#119</a>
from klkvr/klkvr/fix-no-std</li>
<li><a
href="80b6f2a7fd"><code>80b6f2a</code></a>
fix last references of use_std</li>
<li><a
href="2b71801b05"><code>2b71801</code></a>
serde 1.0.95</li>
<li><a
href="8c1ea3e557"><code>8c1ea3e</code></a>
use_std -&gt; std</li>
<li><a
href="d743e25f52"><code>d743e25</code></a>
fix: no-std with serde feature</li>
<li><a
href="6e6dc26828"><code>6e6dc26</code></a>
Merge pull request <a
href="https://redirect.github.com/rayon-rs/either/issues/117">#117</a>
from cuviper/release-1.14.0</li>
<li><a
href="937620642b"><code>9376206</code></a>
Release 1.14.0</li>
<li><a
href="4db2c30e5f"><code>4db2c30</code></a>
Merge pull request <a
href="https://redirect.github.com/rayon-rs/either/issues/118">#118</a>
from cuviper/clippy</li>
<li>Additional commits viewable in <a
href="https://github.com/rayon-rs/either/compare/1.13.0...1.15.0">compare
view</a></li>
</ul>
</details>
<br />


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rust/Cargo.lock

@@ -1787,9 +1787,9 @@ checksum = "0d6ef0072f8a535281e4876be788938b528e9a1d43900b82c2569af7da799125"
 
 [[package]]
 name = "either"
-version = "1.13.0"
+version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "60b1af1c220855b6ceac025d3f6ecdd2b7c4894bfe9cd9bda4fbb4bc7c0d4cf0"
+checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
 
 [[package]]
 name = "embed-resource"