build(deps): bump github.com/spf13/viper from 1.17.0 to 1.18.1

Bumps [github.com/spf13/viper](https://github.com/spf13/viper) from 1.17.0 to 1.18.1.
- [Release notes](https://github.com/spf13/viper/releases)
- [Commits](spf13/viper@v1.17.0...v1.18.1)

---
updated-dependencies:
- dependency-name: github.com/spf13/viper
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -8,20 +8,18 @@ require (
 	github.com/prometheus/common v0.45.0
 	github.com/rs/zerolog v1.31.0
 	github.com/spf13/pflag v1.0.5
-	github.com/spf13/viper v1.17.0
+	github.com/spf13/viper v1.18.1
 	google.golang.org/grpc v1.59.0
 	google.golang.org/protobuf v1.31.0
 	gopkg.in/rethinkdb/rethinkdb-go.v6 v6.2.2
 )
 
 require (
-	github.com/fsnotify/fsnotify v1.7.0 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/opentracing/opentracing-go v1.2.0 // indirect
 	github.com/prometheus/client_model v0.5.0 // indirect
 	github.com/prometheus/procfs v0.12.0 // indirect
 	github.com/sirupsen/logrus v1.9.3 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	golang.org/x/exp v0.0.0-20231110203233-9a3e6036ecaa // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20231120223509-83a465c0220f // indirect
 )