Update removal warnings to 1.26

Kubernetes-commit: 68758fc5c5099c83104a637e6d6ad3f4534f0d08

Author: liggitt

plugin/pkg/client/auth/azure/azure.go

@@ -89,7 +89,7 @@ var warnOnce sync.Once
 func newAzureAuthProvider(_ string, cfg map[string]string, persister restclient.AuthProviderConfigPersister) (restclient.AuthProvider, error) {
 	// deprecated in v1.22, remove in v1.25
 	warnOnce.Do(func() {
-		klog.Warningf(`WARNING: the azure auth plugin is deprecated in v1.22+, unavailable in v1.25+; use https://github.com/Azure/kubelogin instead.
+		klog.Warningf(`WARNING: the azure auth plugin is deprecated in v1.22+, unavailable in v1.26+; use https://github.com/Azure/kubelogin instead.
 To learn more, consult https://kubernetes.io/docs/reference/access-authn-authz/authentication/#client-go-credential-plugins`)
 	})
 

plugin/pkg/client/auth/gcp/gcp.go

@@ -116,7 +116,7 @@ var warnOnce sync.Once
 
 func newGCPAuthProvider(_ string, gcpConfig map[string]string, persister restclient.AuthProviderConfigPersister) (restclient.AuthProvider, error) {
 	warnOnce.Do(func() {
-		klog.Warningf(`WARNING: the gcp auth plugin is deprecated in v1.22+, unavailable in v1.25+; use gcloud instead.
+		klog.Warningf(`WARNING: the gcp auth plugin is deprecated in v1.22+, unavailable in v1.26+; use gcloud instead.
 To learn more, consult https://cloud.google.com/blog/products/containers-kubernetes/kubectl-auth-changes-in-gke`)
 	})