Bump the gomod group with 1 update (#92)

Bumps the gomod group with 1 update: [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang).


Updates `github.com/prometheus/client_golang` from 1.17.0 to 1.18.0
- [Release notes](https://github.com/prometheus/client_golang/releases)
- [Changelog](https://github.com/prometheus/client_golang/blob/main/CHANGELOG.md)
- [Commits](prometheus/client_golang@v1.17.0...v1.18.0)

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

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

go.mod

@@ -3,7 +3,7 @@ module github.com/systemli/prometheus-onion-service-exporter
 go 1.17
 
 require (
-	github.com/prometheus/client_golang v1.17.0
+	github.com/prometheus/client_golang v1.18.0
 	github.com/sirupsen/logrus v1.9.3
 	golang.org/x/net v0.19.0
 	gopkg.in/yaml.v2 v2.4.0
@@ -12,12 +12,11 @@ require (
 require (
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.2.0 // indirect
-	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/kr/text v0.2.0 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
-	github.com/prometheus/client_model v0.4.1-0.20230718164431-9a2bf3000d16 // indirect
-	github.com/prometheus/common v0.44.0 // indirect
-	github.com/prometheus/procfs v0.11.1 // indirect
+	github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 // indirect
+	github.com/prometheus/client_model v0.5.0 // indirect
+	github.com/prometheus/common v0.45.0 // indirect
+	github.com/prometheus/procfs v0.12.0 // indirect
 	golang.org/x/sys v0.15.0 // indirect
 	google.golang.org/protobuf v1.31.0 // indirect
 )