[stable/rabbitmq] Adapt docs to Helm 3 (#20676)

Signed-off-by: Carlos Rodriguez Hernandez <crhernandez@bitnami.com>

stable/rabbitmq/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: rabbitmq
-version: 6.17.1
+version: 6.17.2
 appVersion: 3.8.2
 description: Open source message broker software that implements the Advanced Message Queuing Protocol (AMQP)
 keywords:

stable/rabbitmq/README.md

@@ -5,7 +5,7 @@
 ## TL;DR;
 
 ```bash
-$ helm install stable/rabbitmq
+$ helm install my-release stable/rabbitmq
 ```
 
 ## Introduction
@@ -25,7 +25,7 @@ Bitnami charts can be used with [Kubeapps](https://kubeapps.com/) for deployment
 To install the chart with the release name `my-release`:
 
 ```bash
-$ helm install --name my-release stable/rabbitmq
+$ helm install my-release stable/rabbitmq
 ```
 
 The command deploys RabbitMQ on the Kubernetes cluster in the default configuration. The [Parameters](#parameters) section lists the parameters that can be configured during installation.
@@ -189,7 +189,7 @@ The above parameters map to the env variables defined in [bitnami/rabbitmq](http
 Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`. For example,
 
 ```bash
-$ helm install --name my-release \
+$ helm install my-release \
   --set rabbitmq.username=admin,rabbitmq.password=secretpassword,rabbitmq.erlangCookie=secretcookie \
     stable/rabbitmq
 ```
@@ -199,7 +199,7 @@ The above command sets the RabbitMQ admin username and password to `admin` and `
 Alternatively, a YAML file that specifies the values for the parameters can be provided while installing the chart. For example,
 
 ```bash
-$ helm install --name my-release -f values.yaml stable/rabbitmq
+$ helm install my-release -f values.yaml stable/rabbitmq
 ```
 
 > **Tip**: You can use the default [values.yaml](values.yaml)
@@ -385,7 +385,7 @@ The chart mounts a [Persistent Volume](http://kubernetes.io/docs/user-guide/pers
 1. Install the chart
 
 ```bash
-$ helm install --set persistence.existingClaim=PVC_NAME rabbitmq
+$ helm install my-release --set persistence.existingClaim=PVC_NAME stable/rabbitmq
 ```
 
 ### Adjust permissions of the persistence volume mountpoint

stable/rabbitmq/templates/_helpers.tpl

@@ -235,7 +235,7 @@ rabbitmq: LDAP
     Invalid LDAP configuration. When enabling LDAP support, the parameters "ldap.server",
     "ldap.port", and "ldap. user_dn_pattern" are mandatory. Please provide them:
 
-    $ helm install --name {{ .Release.Name }} stable/rabbitmq \
+    $ helm install {{ .Release.Name }} stable/rabbitmq \
       --set ldap.enabled=true \
       --set ldap.server="lmy-ldap-server" \
       --set ldap.port="389" \