TST: Change sqlite test query string values to single quotes
xref https://github.com/pandas-dev/pandas/actions/runs/13505086719/job/37732738398

Might be a new failure interaction with `sqlite3` and sqlite 3.49 being released recently https://www.sqlite.org/changes.html, but if this query is backward compatible we might as well use this form.

closes https://github.com/pandas-dev/pandas/issues/60989
Since this is passing on sqlite 3.48 (tested on ubuntu-arm) and 3.49 (tested on ubuntu-(x86)), going to merge to get to green