doc: make the chart installation doc easier to understand.

Signed-off-by: jwcesign <[email protected]>

Author: jwcesign

charts/karmada/README.md

@@ -23,41 +23,41 @@ To install the chart with the release name `karmada` in namespace `karmada-syste
 
 - local installation
 
-Switch to the `root` directory of the repo.
+  Switch to the `root` directory of the repo.
 
-```console
-helm install karmada -n karmada-system --create-namespace --dependency-update ./charts/karmada
-```
+  ```console
+  helm install karmada -n karmada-system --create-namespace --dependency-update ./charts/karmada
+  ```
 
 - remote installation
 
-First, add the Karmada chart repo to your local repository.
+  First, add the Karmada chart repo to your local repository.
 
-```console
-$ helm repo add karmada-charts https://raw.githubusercontent.com/karmada-io/karmada/master/charts
-$ helm repo list
-NAME            URL
-karmada-charts   https://raw.githubusercontent.com/karmada-io/karmada/master/charts
-```
+  ```console
+  $ helm repo add karmada-charts https://raw.githubusercontent.com/karmada-io/karmada/master/charts
+  $ helm repo list
+  NAME            URL
+  karmada-charts   https://raw.githubusercontent.com/karmada-io/karmada/master/charts
+  ```
 
-With the repo added, available charts and versions can be viewed.
+  With the repo added, available charts and versions can be viewed.
 
-```console
-helm search repo karmada
-```
+  ```console
+  helm search repo karmada
+  ```
 
-Install the chart and specify the version to install with the --version argument. Replace <x.x.x> with your desired version.
+  Install the chart and specify the version to install with the --version argument. Replace <x.x.x> with your desired version.
 
-```console
-helm --namespace karmada-system upgrade -i karmada karmada-charts/karmada --version=<x.x.x> --create-namespace
-Release "karmada" does not exist. Installing it now.
-NAME: karmada
-LAST DEPLOYED: Mon May 30 07:19:36 2022
-NAMESPACE: karmada-system
-STATUS: deployed
-REVISION: 1
-TEST SUITE: None
-```
+  ```console
+  helm --namespace karmada-system upgrade -i karmada karmada-charts/karmada --version=<x.x.x> --create-namespace
+  Release "karmada" does not exist. Installing it now.
+  NAME: karmada
+  LAST DEPLOYED: Mon May 30 07:19:36 2022
+  NAMESPACE: karmada-system
+  STATUS: deployed
+  REVISION: 1
+  TEST SUITE: None
+  ```
 
 Get kubeconfig from the cluster:
 
@@ -107,7 +107,7 @@ The command removes all the Kubernetes components associated with the chart and
 
 ```console
 kubectl delete sa/karmada-pre-job -nkarmada-system
-kubectl delete clusterRole/karmada-pre-job 
+kubectl delete clusterRole/karmada-pre-job
 kubectl delete clusterRoleBinding/karmada-pre-job
 kubectl delete ns karmada-system
 ```