build(deps): bump github.com/go-viper/mapstructure/v2 (#16914)

Bumps [github.com/go-viper/mapstructure/v2](https://github.com/go-viper/mapstructure) from 2.0.0-alpha.1 to 2.4.0.
- [Release notes](https://github.com/go-viper/mapstructure/releases)
- [Changelog](https://github.com/go-viper/mapstructure/blob/main/CHANGELOG.md)
- [Commits](https://github.com/go-viper/mapstructure/compare/v2.0.0-alpha.1...v2.4.0)

---
updated-dependencies:
- dependency-name: github.com/go-viper/mapstructure/v2
  dependency-version: 2.4.0
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

go.mod

@@ -180,7 +180,7 @@ require (
 	github.com/go-errors/errors v1.4.2 // indirect
 	github.com/go-gorp/gorp/v3 v3.1.0 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
-	github.com/go-viper/mapstructure/v2 v2.0.0-alpha.1 // indirect
+	github.com/go-viper/mapstructure/v2 v2.4.0 // indirect
 	github.com/gobuffalo/flect v1.0.3 // indirect
 	github.com/goccy/go-yaml v1.12.0 // indirect
 	github.com/gokrazy/gokapi v0.0.0-20250222071133-506fdb322775 // indirect