Bump github.com/prometheus/client_golang from 1.12.1 to 1.12.2 (#67)

Bumps [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang) from 1.12.1 to 1.12.2.
- [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...v1.12.2)

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

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

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

go.mod

@@ -3,7 +3,7 @@ module go.unistack.org/micro-meter-prometheus/v3
 go 1.16
 
 require (
-	github.com/prometheus/client_golang v1.12.1
+	github.com/prometheus/client_golang v1.12.2
 	github.com/prometheus/client_model v0.2.0
 	github.com/prometheus/common v0.34.0
 	go.unistack.org/micro/v3 v3.9.8