[stable/jenkins] Update Readme to work with Helm 3 (#20855)

* Update readme and bump chart version
Signed-off-by: Bharath Baiju <bharathkrishnakb@gmail.com>

Signed-off-by: bharathkkb <bharathkrishnakb@gmail.com>

* Update Changelog
Signed-off-by: Bharath Baiju <bharathkrishnakb@gmail.com>

Signed-off-by: bharathkkb <bharathkrishnakb@gmail.com>

stable/jenkins/CHANGELOG.md

@@ -5,6 +5,10 @@ numbering uses [semantic versioning](http://semver.org).
 
 NOTE: The change log until version 1.5.7 is auto generated based on git commits. Those include a reference to the git commit to be able to get more details.
 
+## 1.9.19
+
+Update docs for Helm 3
+
 ## 1.9.18
 
 Make `jenkins-home` attachable to Azure Disks without pvc

stable/jenkins/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v1
 name: jenkins
 home: https://jenkins.io/
-version: 1.9.18
+version: 1.9.19
 appVersion: lts
 description: Open source continuous integration server. It supports multiple SCM tools
   including CVS, Subversion and Git. It can execute Apache Ant and Apache Maven-based

stable/jenkins/README.md

@@ -18,7 +18,7 @@ This chart will do the following:
 To install the chart with the release name `my-release`:
 
 ```bash
-$ helm install --name my-release stable/jenkins
+$ helm install my-release stable/jenkins
 ```
 
 ## Upgrading an existing Release to a new major version
@@ -220,7 +220,7 @@ Specify each parameter using the `--set key=value[,key=value]` argument to `helm
 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/jenkins
+$ helm install my-release -f values.yaml stable/jenkins
 ```
 
 > **Tip**: You can use the default [values.yaml](values.yaml)
@@ -320,7 +320,7 @@ It is possible to mount several volumes using `persistence.volumes` and `persist
 3. Install the chart
 
 ```bash
-$ helm install --name my-release --set persistence.existingClaim=PVC_NAME stable/jenkins
+$ helm install my-release --set persistence.existingClaim=PVC_NAME stable/jenkins
 ```
 
 #### Storage Class
@@ -328,7 +328,7 @@ $ helm install --name my-release --set persistence.existingClaim=PVC_NAME stable
 It is possible to define which storage class to use:
 
 ```bash
-$ helm install --name my-release --set persistence.storageClass=customStorageClass stable/jenkins
+$ helm install my-release --set persistence.storageClass=customStorageClass stable/jenkins
 ```
 
 If set to a dash (`-`, as in `persistence.storageClass=-`), the dynamic provision is disabled.