build(deps): bump golang.org/x/mod from 0.27.0 to 0.28.0 (#449)

Bumps [golang.org/x/mod](https://github.com/golang/mod) from 0.27.0 to
0.28.0.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="1759e969da"><code>1759e96</code></a>
go.mod: update golang.org/x dependencies</li>
<li><a
href="f060e16ef6"><code>f060e16</code></a>
all: upgrade go directive to at least 1.24.0 [generated]</li>
<li>See full diff in <a
href="https://github.com/golang/mod/compare/v0.27.0...v0.28.0">compare
view</a></li>
</ul>
</details>
<br />


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go.mod

@@ -18,7 +18,7 @@ require (
 	go.opentelemetry.io/otel/metric v1.38.0
 	go.opentelemetry.io/otel/sdk v1.38.0
 	go.opentelemetry.io/otel/sdk/metric v1.38.0
-	golang.org/x/mod v0.27.0
+	golang.org/x/mod v0.28.0
 	golang.org/x/oauth2 v0.30.0
 )