Add the squash-merged SHA of #29622 (style(ui): run prettier --write
across the dashboard) to .git-blame-ignore-revs so the bulk reformat
stops masking the real authors of those lines in git blame and the
GitHub blame UI
because I made a lot of fairly mindless changes to pydantic code to fix warnings
and I don't want git blame to give people the impression that I know more about
this code than I do.