[stable/mongodb] Adapt docs to Helm 3 (#20662)

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

stable/mongodb/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: mongodb
-version: 7.8.3
+version: 7.8.4
 appVersion: 4.2.3
 description: NoSQL document-oriented database that stores JSON-like documents with dynamic schemas, simplifying the integration of data in content-driven applications.
 keywords:

stable/mongodb/README.md

@@ -5,7 +5,7 @@
 ## TL;DR;
 
 ```bash
-$ helm install stable/mongodb
+$ helm install my-release stable/mongodb
 ```
 
 ## Introduction
@@ -26,7 +26,7 @@ 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/mongodb
+$ helm install my-release stable/mongodb
 ```
 
 The command deploys MongoDB on the Kubernetes cluster in the default configuration. The [Parameters](#parameters) section lists the parameters that can be configured during installation.
@@ -188,7 +188,7 @@ The following table lists the configurable parameters of the MongoDB chart and t
 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 mongodbRootPassword=secretpassword,mongodbUsername=my-user,mongodbPassword=my-password,mongodbDatabase=my-database \
     stable/mongodb
 ```
@@ -198,7 +198,7 @@ The above command sets the MongoDB `root` account password to `secretpassword`.
 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/mongodb
+$ helm install my-release -f values.yaml stable/mongodb
 ```
 
 > **Tip**: You can use the default [values.yaml](values.yaml)