fix(debian): Fix kubernetes apt repo

images/debian/12.1/Dockerfile

@@ -29,8 +29,8 @@ RUN curl https://baltocdn.com/helm/signing.asc | gpg --dearmor | tee /usr/share/
     echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/helm.gpg] https://baltocdn.com/helm/stable/debian/ all main" | tee /etc/apt/sources.list.d/helm-stable-debian.list
 
 # Kubernetes repo
-RUN curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add && \
-    apt-add-repository "deb http://apt.kubernetes.io/ kubernetes-xenial main"
+RUN curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.29/deb/Release.key | gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg && \
+    echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.29/deb/ /' | tee /etc/apt/sources.list.d/kubernetes.list
 
 # Docker CLI stuff.
 RUN mkdir -p /etc/apt/keyrings && \