fix prod(deps): bump github.com/spf13/viper from 1.16.0 to 1.18.0

Bumps [github.com/spf13/viper](https://github.com/spf13/viper) from 1.16.0 to 1.18.0.
- [Release notes](https://github.com/spf13/viper/releases)
- [Commits](spf13/viper@v1.16.0...v1.18.0)

---
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

@@ -6,31 +6,35 @@ require (
 	github.com/google/go-github/v48 v48.2.0
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/spf13/cobra v1.7.0
-	github.com/spf13/viper v1.16.0
-	golang.org/x/exp v0.0.0-20221230185412-738e83a70c30
-	golang.org/x/oauth2 v0.12.0
+	github.com/spf13/viper v1.18.0
+	golang.org/x/exp v0.0.0-20230905200255-921286631fa9
+	golang.org/x/oauth2 v0.15.0
 	gopkg.in/yaml.v2 v2.4.0
 	k8s.io/apimachinery v0.28.2
 )
 
 require (
-	github.com/fsnotify/fsnotify v1.6.0 // indirect
+	github.com/fsnotify/fsnotify v1.7.0 // indirect
 	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/google/go-querystring v1.1.0 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/magiconair/properties v1.8.7 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
-	github.com/pelletier/go-toml/v2 v2.0.8 // indirect
-	github.com/spf13/afero v1.9.5 // indirect
-	github.com/spf13/cast v1.5.1 // indirect
-	github.com/spf13/jwalterweatherman v1.1.0 // indirect
+	github.com/pelletier/go-toml/v2 v2.1.0 // indirect
+	github.com/sagikazarmark/locafero v0.4.0 // indirect
+	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
+	github.com/sourcegraph/conc v0.3.0 // indirect
+	github.com/spf13/afero v1.11.0 // indirect
+	github.com/spf13/cast v1.6.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
-	github.com/subosito/gotenv v1.4.2 // indirect
-	golang.org/x/crypto v0.13.0 // indirect
-	golang.org/x/net v0.15.0 // indirect
-	golang.org/x/sys v0.12.0 // indirect
-	golang.org/x/text v0.13.0 // indirect
+	github.com/subosito/gotenv v1.6.0 // indirect
+	go.uber.org/atomic v1.9.0 // indirect
+	go.uber.org/multierr v1.9.0 // indirect
+	golang.org/x/crypto v0.16.0 // indirect
+	golang.org/x/net v0.19.0 // indirect
+	golang.org/x/sys v0.15.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
 	google.golang.org/protobuf v1.31.0 // indirect
 	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect