Don't clobber the user's upstream settings (#26486)

It's not clobbering time :(

Release Notes:

- Git Beta: Fixed a bug where our push button would always overwrite the
current branch's upstream
fd7ab20ea4Mikayla Maki committed on 3/11/2025, 10:02:22 PM· committed by GitHubparent7019aca
1 file changedLine totals unavailable