[windup-dev] Docs for duplicated archives handling

[Ondrej Zizka]

Hi Andrea,

there's a new feature - dupl archives handling.
Story 120 in Taiga 
https://tree.taiga.io/project/rdruss-jboss-migration-windup-v3/us/120
PR: https://github.com/windup/windup/pull/936
There's no Jira so I am not sure where to put the documentation notes, 
so at least letting you know this way.

It will need a note in the Report Index description like this:

For non-source mode (when scanning an app archives), the aggregated 
issue counts and story points in tables and charts are taking duplicated 
sub-archives into account, so that an application module which appears 
in multiple applications or more than once in one application is only 
counted once into the migration effort.

Ondra