update installation commands for postgres

Signed-off-by: MUzairS15 <[email protected]>

Author: MUzairS15

content/en/cloud/self-hosted/deploy-with-helm.md

@@ -58,7 +58,8 @@ __NOTE: Configuring the extension in some other database will result in failure
 ##### 1. Install Postgres database
 
 ```bash
-helm install -f ./install/postgresql/values.yaml postgres ./install/postgresql -n <namespace>
+helm repo add bitnami https://charts.bitnami.com/bitnami
+helm install postgresql bitnami/postgresql --version 14.0.1
 ```
 
 ##### 2. Install Remote Provider Server and Identity Provider