Bump github.com/prometheus/client_golang (#131)

Bumps [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang) from 1.20.6-0.20250117112434-e0800f53b498 to 1.21.0.
- [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/commits/v1.21.0)

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

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

Author: dependabot[bot]

go.mod

@@ -8,7 +8,7 @@ require (
 	github.com/google/go-cmp v0.6.0
 	github.com/nelkinda/health-go v0.0.1
 	github.com/oklog/run v1.1.0
-	github.com/prometheus/client_golang v1.20.6-0.20250117112434-e0800f53b498
+	github.com/prometheus/client_golang v1.21.0
 	github.com/prometheus/client_golang/exp v0.0.0-20250227122456-ad23ad6d5468
 	github.com/prometheus/client_model v0.6.1
 	github.com/prometheus/common v0.62.0

go.sum

@@ -98,8 +98,8 @@ github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINE
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 h1:Jamvg5psRIccs7FGNTlIRMkT8wgtp5eCXdBlqhYGL6U=
 github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/prometheus/client_golang v1.20.6-0.20250117112434-e0800f53b498 h1:pvxJNIN8Tr8FleTHltMExyfFF2GOFBcYbgggNDKvWDw=
-github.com/prometheus/client_golang v1.20.6-0.20250117112434-e0800f53b498/go.mod h1:SJYWANZZtDbfu6CSYeDvRDkzhGX71yepDKePKDTya3M=
+github.com/prometheus/client_golang v1.21.0 h1:DIsaGmiaBkSangBgMtWdNfxbMNdku5IK6iNhrEqWvdA=
+github.com/prometheus/client_golang v1.21.0/go.mod h1:U9NM32ykUErtVBxdvD3zfi+EuFkkaBvMb09mIfe0Zgg=
 github.com/prometheus/client_golang/exp v0.0.0-20250227122456-ad23ad6d5468 h1:Lg8dMj9NGvHGy9ORtzyCkTvHpz1rsE78HT3S9W4ZC1U=
 github.com/prometheus/client_golang/exp v0.0.0-20250227122456-ad23ad6d5468/go.mod h1:QdwnzTHLXXx636iZ1pfTiCI1Bn/b/20AgMqkPQr4xfA=
 github.com/prometheus/client_model v0.6.1 h1:ZKSh/rekM+n3CeS952MLRAdFwIKqeY8b62p8ais2e9E=