Change the `id` for `kubernetes` doc link to work (#11176) (#11178)

* Change the `id` for doc link to work

* Added `druid-kubernetes-extensions` to the list

Co-authored-by: Jeet Patel <jp707049@gmail.com>
diff --git a/docs/development/extensions-core/kubernetes.md b/docs/development/extensions-core/kubernetes.md
index 7bc1b0a..90be465 100644
--- a/docs/development/extensions-core/kubernetes.md
+++ b/docs/development/extensions-core/kubernetes.md
@@ -1,5 +1,5 @@
 ---
-id: druid-kubernetes
+id: kubernetes
 title: "Kubernetes"
 ---
 
@@ -84,4 +84,4 @@
   kind: Role
   name: druid-cluster
   apiGroup: rbac.authorization.k8s.io
-```
\ No newline at end of file
+```
diff --git a/docs/development/extensions.md b/docs/development/extensions.md
index e233bdd..c2bccb0 100644
--- a/docs/development/extensions.md
+++ b/docs/development/extensions.md
@@ -62,6 +62,7 @@
 |postgresql-metadata-storage|PostgreSQL metadata store.|[link](../development/extensions-core/postgresql.md)|
 |simple-client-sslcontext|Simple SSLContext provider module to be used by Druid's internal HttpClient when talking to other Druid processes over HTTPS.|[link](../development/extensions-core/simple-client-sslcontext.md)|
 |druid-pac4j|OpenID Connect authentication for druid processes.|[link](../development/extensions-core/druid-pac4j.md)|
+|druid-kubernetes-extensions|Druid cluster deployment on Kubernetes without Zookeeper.|[link](../development/extensions-core/kubernetes.md)|
 
 ## Community extensions