Bump github.com/prometheus/client_golang from 1.21.0 to 1.21.1 (prometheus-community#1144)

Bumps [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang) from 1.21.0 to 1.21.1.
- [Release notes](https://github.com/prometheus/client_golang/releases)
- [Changelog](https://github.com/prometheus/client_golang/blob/main/CHANGELOG.md)
- [Commits](prometheus/client_golang@v1.21.0...v1.21.1)

---
updated-dependencies:
- dependency-name: github.com/prometheus/client_golang
  dependency-version: 1.21.1
  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>

Author: dependabot[bot]

go.mod

@@ -2,12 +2,14 @@ module github.com/prometheus-community/postgres_exporter
 
 go 1.23.0
 
+toolchain go1.24.1
+
 require (
 	github.com/DATA-DOG/go-sqlmock v1.5.2
 	github.com/alecthomas/kingpin/v2 v2.4.0
 	github.com/blang/semver/v4 v4.0.0
 	github.com/lib/pq v1.10.9
-	github.com/prometheus/client_golang v1.21.0
+	github.com/prometheus/client_golang v1.21.1
 	github.com/prometheus/client_model v0.6.1
 	github.com/prometheus/common v0.62.0
 	github.com/prometheus/exporter-toolkit v0.14.0

go.sum

@@ -50,8 +50,8 @@ github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f/go.mod h1:qRW
 github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-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 v1.21.1 h1:DOvXXTqVzvkIewV/CDPFdejpMCGeMcbGCQ8YOmu+Ibk=
+github.com/prometheus/client_golang v1.21.1/go.mod h1:U9NM32ykUErtVBxdvD3zfi+EuFkkaBvMb09mIfe0Zgg=
 github.com/prometheus/client_model v0.6.1 h1:ZKSh/rekM+n3CeS952MLRAdFwIKqeY8b62p8ais2e9E=
 github.com/prometheus/client_model v0.6.1/go.mod h1:OrxVMOVHjw3lKMa8+x6HeMGkHMQyHDk9E3jmP2AmGiY=
 github.com/prometheus/common v0.62.0 h1:xasJaQlnWAeyHdUBeGjXmutelfJHWMRr+Fg4QszZ2Io=