Fix wayward brackets

[dehnert]

Some forms have random brackets scattered throughout

https://discord.com/channels/843577671085850644/948444185000804403/1375650324366364833

This appears to be https://forum.djangoproject.com/t/square-brackets-bug/29632/13

(Also python/cpython#117482 and python/cpython#117660 (comment))

https://discord.com/channels/843577671085850644/948444185000804403/1375650324366364833:

I looked at the bracket bugs a bit, and it looks like maybe Python 3.12.5 fixes it, but Ubuntu 24.04 only has 3.12.3 (which is what we're already running).