Add document for git password

Signed-off-by: Shinnosuke Sawada-Dazai <[email protected]>

docs/content/en/docs-v0.48.x/user-guide/managing-piped/configuration-reference.md

@@ -49,6 +49,7 @@ spec:
 | hostName | string | The hostname or IP address of the remote git server. Default is the same value with Host. | No |
 | sshKeyFile | string | The path to the private ssh key file. This will be used to clone the source code of the specified git repositories. | No |
 | sshKeyData | string | Base64 encoded string of SSH key. | No |
+| password | string | The base64 encoded password for git used while cloning above Git repository. | No |
 
 ## GitRepository