build(deps): bump github.com/goplus/mod from 0.13.17 to 0.15.1

Bumps [github.com/goplus/mod](https://github.com/goplus/mod) from 0.13.17 to 0.15.1.
- [Release notes](https://github.com/goplus/mod/releases)
- [Commits](https://github.com/goplus/mod/compare/v0.13.17...v0.15.1)

---
updated-dependencies:
- dependency-name: github.com/goplus/mod
  dependency-version: 0.15.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -9,7 +9,7 @@ require (
 	github.com/goplus/lib v0.2.0
 	github.com/goplus/llgo/runtime v0.0.0-20250403035532-0a8a4eb6a653
 	github.com/goplus/llvm v0.8.3
-	github.com/goplus/mod v0.13.17
+	github.com/goplus/mod v0.15.1
 	github.com/qiniu/x v1.13.17
 	golang.org/x/tools v0.30.0
 )