Backport PR #29085 on branch v3.10.x (FIX: Update GTK3Agg backend export name for consistency)#29091

QuLogic merged 1 commit intomatplotlib:v3.10.xmatplotlib/matplotlib:v3.10.xfrom

meeseeksmachine:auto-backport-of-pr-29085-on-v3.10.xmeeseeksmachine/matplotlib:auto-backport-of-pr-29085-on-v3.10.xCopy head branch name to clipboard