fix: search term moved to q

[weber-s]

Summary of changes

Discourse search api use q and not term https://docs.discourse.org/#tag/Search/operation/search .

I do not know for how long it is broken or if it is only for recent discourse version, but this is possible breaking change for pydiscourse.

Checklist

• Changes represent a discrete update
• Commit messages are meaningful and descriptive
• Changeset does not include any extraneous changes unrelated to the discrete change

[bennylope]

Yes, probably a possibility of a breaking change if someone is passing the search term as a keyword argument. Thanks!