chore(deps): update keycloak docker tag to v21

Dockerfile

@@ -3,7 +3,7 @@ ARG ALPINE_VERSION=3.19
 FROM docker.io/alpine:${ALPINE_VERSION}
 
 ARG ALPINE_VERSION
-ARG KUBE_VERSION=1.28.9
+ARG KUBE_VERSION=1.28.8
 
 RUN cd /etc/apk/keys && \
     wget "https://cdn.zero-downtime.net/alpine/stefan@zero-downtime.net-61bb6bfb.rsa.pub" && \

charts/kubeadm/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 name: kubeadm
 description: KubeZero Kubeadm cluster config
 type: application
-version: 1.28.9
+version: 1.28.8
 home: https://kubezero.com
 icon: https://cdn.zero-downtime.net/assets/kubezero/logo-small-64.png
 keywords:

charts/kubezero-auth/Chart.yaml

@@ -17,7 +17,7 @@ dependencies:
     version: ">= 0.1.6"
     repository: https://cdn.zero-downtime.net/charts/
   - name: keycloak
-    version: 21.0.2
+    version: 21.0.1
     repository: "oci://registry-1.docker.io/bitnamicharts"
     condition: keycloak.enabled
 kubeVersion: ">= 1.26.0"

charts/kubezero/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 name: kubezero
 description: KubeZero - Root App of Apps chart
 type: application
-version: 1.28.9
+version: 1.28.8
 home: https://kubezero.com
 icon: https://cdn.zero-downtime.net/assets/kubezero/logo-small-64.png
 keywords: