Bump golang.org/x/mod from 0.15.0 to 0.16.0 (#1271)

Bumps [golang.org/x/mod](https://github.com/golang/mod) from 0.15.0 to
0.16.0.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/golang/mod/commit/766dc5df63e3e3e5cd6b1682f522a01c99723beb"><code>766dc5d</code></a>
modfile: use new go version string format in WorkFile.add error</li>
<li>See full diff in <a
href="https://github.com/golang/mod/compare/v0.15.0...v0.16.0">compare
view</a></li>
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go.mod

@@ -21,7 +21,7 @@ require (
 	github.com/spf13/pflag v1.0.5 // BSD-3-Clause
 	github.com/stretchr/testify v1.9.0 // MIT
 	golang.org/x/exp v0.0.0-20240222234643-814bf88cf225
-	golang.org/x/mod v0.15.0
+	golang.org/x/mod v0.16.0
 	golang.org/x/oauth2 v0.18.0
 	golang.org/x/sync v0.6.0
 	golang.org/x/term v0.18.0