Update jaas index.adoc

[karstenhusberg]

There is no ee10-jaas module, or ee8-jaas or ee8-jaas as far as I can see and module 'jaas' made it work in my ee10 set-up.

[janbartel]

@karstenhusberg can you also add one more change to this PR? The jetty-ee10/jetty-ee10-webapp/src/main/java/org/eclipse/jetty/ee10/webapp/JaasConfiguration.java class refers to the package org.eclipse.jetty.ee10.jaas which doesn't exist, at this line: https://github.com/jetty/jetty.project/blob/jetty-12.0.x/jetty-ee10/jetty-ee10-webapp/src/main/java/org/eclipse/jetty/ee10/webapp/JaasConfiguration.java#L38`

[janbartel]

Please see my comment about making one extra little change.

[karstenhusberg]

@janbartel I've updated as per your request. Unfortunately I never got what I intented to do to work and now I must hurry on to other tracks. I was supposed to JNDI-publish a jakarta.mail.Session as described here https://jetty.org/docs/jetty/12/operations-guide/jndi/index.html#mail but when looking it up from within my application I only got a MailSessionReference object not a Session. Probably me doing some obvious error :-)

[janbartel]

Thanks @karstenhusberg, I've merged your changes.