Backport of docs/vault-secrets-operator: update for beta install into…

… release/1.13.x (hashicorp#19838)

* backport of commit f2e6480

---------

Co-authored-by: Theron Voran <tvoran@users.noreply.github.com>

website/content/docs/platform/k8s/vso/installation.mdx

@@ -26,15 +26,15 @@ HashiCorp helm repository and ensure you have access to the chart:
 $ helm repo add hashicorp https://helm.releases.hashicorp.com
 "hashicorp" has been added to your repositories
 
-$ helm search repo hashicorp/vault-secrets-operator
+$ helm search repo hashicorp/vault-secrets-operator --devel
 NAME           	CHART VERSION	APP VERSION	DESCRIPTION
 hashicorp/vault-secrets-operator	0.1.0-beta       	0.1.0-beta     	Official HashiCorp Vault Secrets Operator Chart
 ```
 
 Then install the Operator:
 
 ```shell-session
-$ helm install --create-namespace --namespace vault-secrets-operator vault-secrets-operator hashicorp/vault-secrets-operator
+$ helm install --create-namespace --namespace vault-secrets-operator vault-secrets-operator hashicorp/vault-secrets-operator --version 0.1.0-beta
 ```