Bump github.com/urfave/cli/v2 from 2.25.1 to 2.25.6

Bumps [github.com/urfave/cli/v2](https://github.com/urfave/cli) from 2.25.1 to 2.25.6.
- [Release notes](https://github.com/urfave/cli/releases)
- [Changelog](https://github.com/urfave/cli/blob/main/docs/CHANGELOG.md)
- [Commits](urfave/cli@v2.25.1...v2.25.6)

---
updated-dependencies:
- dependency-name: github.com/urfave/cli/v2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

go.mod

@@ -4,7 +4,7 @@ go 1.20
 
 require (
 	github.com/stretchr/testify v1.8.2
-	github.com/urfave/cli/v2 v2.25.1
+	github.com/urfave/cli/v2 v2.25.6
 	k8s.io/api v0.27.1
 	k8s.io/apimachinery v0.27.1
 	k8s.io/client-go v0.27.1
@@ -39,7 +39,6 @@ require (
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
-	github.com/stretchr/objx v0.5.0 // indirect
 	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
 	golang.org/x/net v0.9.0 // indirect
 	golang.org/x/oauth2 v0.7.0 // indirect