branch_picker: Ensure description truncates (#61360)

Just a small tweak ensuring the description truncates nicely. I think
this was a recently-introduced regression, as I am pretty sure it was
truncating well not too long ago.

Release Notes:

- N/A
9caf263a9bDanilo Leal committed on 7/20/2026, 8:25:07 PM· committed by GitHubparent3de8ad9
1 file changedLine totals unavailable