build(deps): bump golang.org/x/sync from 0.15.0 to 0.16.0 (#3246)

Bumps [golang.org/x/sync](https://github.com/golang/sync) from 0.15.0 to
0.16.0.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/golang/sync/commit/7fad2c9213e0821bd78435a9c106806f2fc383f1"><code>7fad2c9</code></a>
errgroup: revert propagation of panics</li>
<li>See full diff in <a
href="https://github.com/golang/sync/compare/v0.15.0...v0.16.0">compare
view</a></li>
</ul>
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go.mod

@@ -31,7 +31,7 @@ require (
 	golang.org/x/exp v0.0.0-20250620022241-b7579e27df2b
 	golang.org/x/mod v0.25.0
 	golang.org/x/oauth2 v0.30.0
-	golang.org/x/sync v0.15.0
+	golang.org/x/sync v0.16.0
 	golang.org/x/sys v0.33.0 // indirect
 	golang.org/x/term v0.32.0
 	golang.org/x/text v0.26.0