build(deps): bump k8s.io/client-go in /contrib/config/kubernetes (#2695)

Bumps [k8s.io/client-go](https://github.com/kubernetes/client-go) from 0.24.3 to 0.26.2.
- [Release notes](https://github.com/kubernetes/client-go/releases)
- [Changelog](https://github.com/kubernetes/client-go/blob/master/CHANGELOG.md)
- [Commits](kubernetes/client-go@v0.24.3...v0.26.2)

---
updated-dependencies:
- dependency-name: k8s.io/client-go
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

contrib/config/kubernetes/go.mod

@@ -4,9 +4,9 @@ go 1.16
 
 require (
 	github.com/go-kratos/kratos/v2 v2.4.0
-	k8s.io/api v0.24.3
+	k8s.io/api v0.26.2
 	k8s.io/apimachinery v0.26.2
-	k8s.io/client-go v0.24.3
+	k8s.io/client-go v0.26.2
 )
 
 replace github.com/go-kratos/kratos/v2 => ../../../