build(deps): bump github.com/prometheus/client_golang

Bumps [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang) from 1.12.1 to 1.13.0.
- [Release notes](https://github.com/prometheus/client_golang/releases)
- [Changelog](https://github.com/prometheus/client_golang/blob/main/CHANGELOG.md)
- [Commits](https://github.com/prometheus/client_golang/compare/v1.12.1...v1.13.0)

---
updated-dependencies:
- dependency-name: github.com/prometheus/client_golang
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

vendor/github.com/prometheus/procfs/proc_environ.go

@@ -19,7 +19,7 @@ import (
 	"github.com/prometheus/procfs/internal/util"
 )
 
-// Environ reads process environments from /proc/<pid>/environ
+// Environ reads process environments from `/proc/<pid>/environ`.
 func (p Proc) Environ() ([]string, error) {
 	environments := make([]string, 0)