Document breaking changes after adding named parameters to queryByProvider

The JAVACLIENT-228 improvement introduces a breaking change in the java client, we would like to document it.

There might be no problem for most usage. The issue appears on code that was giving a null queryParam to the method queryByProvider which was mandatory before the fix on them, see JAVACLIENT-219.
You can see below an affected code:

client.repository().queryByProvider(providerName, pageSize, currentPageIndex, maxResults, sortBy, sortOrder, null);