vendor: bump k8s to v0.25.4

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

vendor/k8s.io/client-go/util/cert/OWNERS

@@ -1,9 +1,8 @@
 # See the OWNERS docs at https://go.k8s.io/owners
 
 approvers:
-- sig-auth-certificates-approvers
+  - sig-auth-certificates-approvers
 reviewers:
-- sig-auth-certificates-reviewers
+  - sig-auth-certificates-reviewers
 labels:
-- sig/auth
-
+  - sig/auth

vendor/k8s.io/client-go/util/cert/cert.go

@@ -33,6 +33,7 @@ import (
 	"time"
 
 	"k8s.io/client-go/util/keyutil"
+	netutils "k8s.io/utils/net"
 )
 
 const duration365d = time.Hour * 24 * 365
@@ -157,7 +158,7 @@ func GenerateSelfSignedCertKeyWithFixtures(host string, alternateIPs []net.IP, a
 		BasicConstraintsValid: true,
 	}
 
-	if ip := net.ParseIP(host); ip != nil {
+	if ip := netutils.ParseIPSloppy(host); ip != nil {
 		template.IPAddresses = append(template.IPAddresses, ip)
 	} else {
 		template.DNSNames = append(template.DNSNames, host)