Merge pull request #4378 from k8s-infra-cherrypick-robot/cherry-pick-4288-to-release-1.12

[release-1.12] Update docs summary

Author: k8s-ci-robot

docs/book/src/SUMMARY.md

@@ -10,6 +10,7 @@
     - [API Server Endpoint](./topics/api-server-endpoint.md)
     - [Azure Service Operator](./topics/aso.md)
     - [Cloud Provider Config](./topics/cloud-provider-config.md)
+    - [ClusterClass](./topics/clusterclass.md)
     - [Control Plane Outbound Load Balancer](./topics/control-plane-outbound-lb.md)
     - [Custom Images](./topics/custom-images.md)
     - [Custom Private DNS Zone Name](./topics/custom-dns.md)
@@ -18,6 +19,7 @@
     - [Dual-Stack](./topics/dual-stack.md)
     - [Externally managed Azure infrastructure](./topics/externally-managed-azure-infrastructure.md)
     - [Failure Domains](./topics/failure-domains.md)
+    - [Flatcar](./topics/flatcar.md)
     - [GPU-enabled Clusters](./topics/gpu.md)
     - [Confidential VMs](./topics/confidential-vms.md)
     - [Trusted Launch for VMs](./topics/trusted-launch-for-vms.md)
@@ -35,7 +37,6 @@
     - [Virtual Networks](./topics/custom-vnet.md)
     - [VM Identity](./topics/vm-identity.md)
     - [Windows](./topics/windows.md)
-    - [Flatcar](./topics/flatcar.md)
     - [WebAssembly / WASI Pods](./topics/wasi.md)
 - [Development](./developers/development.md)
     - [Kubernetes Developers](./developers/kubernetes-developers.md)