docs-parts/queries/03-Fetch_lang1.rst: use->used
docs-parts/queries/03-Fetch_lang1.rst: use->used

Co-authored-by: Dimitri Yatsenko <24bef948627238e46f7a1a189276781098b74b3c@vathes.com>
datajoint/datajoint-python,dimitri-yatsenko/datajoint-python