build(deps): bump github.com/goplus/gogen in /compiler

Bumps [github.com/goplus/gogen](https://github.com/goplus/gogen) from 1.16.8 to 1.16.9.
- [Release notes](https://github.com/goplus/gogen/releases)
- [Commits](https://github.com/goplus/gogen/compare/v1.16.8...v1.16.9)

---
updated-dependencies:
- dependency-name: github.com/goplus/gogen
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

compiler/go.mod

@@ -3,7 +3,7 @@ module github.com/goplus/llgo/compiler
 go 1.22.0
 
 require (
-	github.com/goplus/gogen v1.16.8
+	github.com/goplus/gogen v1.16.9
 	github.com/goplus/llgo v0.9.9
 	github.com/goplus/llgo/runtime v0.0.0-00010101000000-000000000000
 	github.com/goplus/llvm v0.8.1