[Docs] Artemis password should be already set upon web console login

Add to enhancements  in 7.11 section of release notes that: Add to enhancements  in 7.11 section of release notes that: To send message from console, ou no longer need to specify a username and password in the Console section of the AMQ Management Console .if a username and password is not set in the Preferences section of the AMQ Management Console, the credentials used to log in to the console are now used to send messages to addresses using the console. Previously, you needed to set a username and password in the Preferences section of the console In order to send messages (meet recroding 14/09/21 (with Dom)). If the credentials are set in the Preferences section of the console, they override the credentials used to login when sending messages.