Backport PR #61921 on branch 2.3.x (DOC: explicitly mention new str dtype is no longer a numpy dtype in migration guide)#61961

jorisvandenbossche merged 1 commit intopandas-dev:2.3.xpandas-dev/pandas:2.3.xfrom

meeseeksmachine:auto-backport-of-pr-61921-on-2.3.xmeeseeksmachine/pandas:auto-backport-of-pr-61921-on-2.3.xCopy head branch name to clipboard