build(deps): bump syn from 2.0.103 to 2.0.104 (#37643)

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Bumps [syn](https://github.com/dtolnay/syn) from 2.0.103 to 2.0.104.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/dtolnay/syn/releases">syn's
releases</a>.</em></p>
<blockquote>
<h2>2.0.104</h2>
<ul>
<li>Disallow attributes on range expression (<a
href="https://redirect.github.com/dtolnay/syn/issues/1872">#1872</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="2283a9852a"><code>2283a98</code></a>
Release 2.0.104</li>
<li><a
href="d745687fff"><code>d745687</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1872">#1872</a>
from dtolnay/attrrange</li>
<li><a
href="350a4ab22d"><code>350a4ab</code></a>
Disallow attributes on range expression</li>
<li><a
href="da96f95362"><code>da96f95</code></a>
Add test of attributes on range</li>
<li><a
href="7a79818f44"><code>7a79818</code></a>
Update test suite to nightly-2025-06-19</li>
<li>See full diff in <a
href="https://github.com/dtolnay/syn/compare/2.0.103...2.0.104">compare
view</a></li>
</ul>
</details>
<br />


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Cargo.lock

@@ -7741,9 +7741,9 @@ checksum = "e454d048db5527d000bfddb77bd072bbf3a1e2ae785f16d9bd116e07c2ab45eb"
 
 [[package]]
 name = "syn"
-version = "2.0.103"
+version = "2.0.104"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e4307e30089d6fd6aff212f2da3a1f9e32f3223b1f010fb09b7c95f90f3ca1e8"
+checksum = "17b6f705963418cdb9927482fa304bc562ece2fdd4f616084c50b7023b435a40"
 dependencies = [
  "proc-macro2",
  "quote",