Caution about mvn deploy causing cache to increase

What does this MR do and why?

This adds a comment to the cache:paths for the Maven repository, that the repository also recieves local installs by mvn deploy. Consiquently users may see the cache increase. The comment advises to consider disabling the local install .

Screenshots or screen recordings

This is a code comment change only.

How to set up and validate locally

This is a code comment change only.

MR acceptance checklist

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