How to upgrade bench?
Inside the frappe-bench directory run this
pip3 install --upgrade frappe-bench
If you use frappe into docker for developpement, the base repo branch for bench is develop, still in 5.2.1. A PR is going to fix that (https://github.com/frappe/bench/pull/1129).
As this part of the docker image is not consistant, so you have to do
pip3 install --upgrade frappe-bench each time your stop/start the docker container
EDIT: a better PR ( chore: update version by hasnain2808 · Pull Request #1138 · frappe/bench · GitHub) was merge, now it’s ok Thank ERPNext Team !
After upgrade ，bench version still shows 5.0.0 ！
try using sudo
pip3 install --upgrade frappe-bench / sudo pip3 install --upgrade frappe-bench