Fix session datetime always being :09 minutes: it's using the month %m in the minutes position

[henrahmagix]

%m is the month; %M is the minutes.

$ irb
irb(main):001> Time.now
=> 2025-09-26 12:33:28.310967 +0100
irb(main):002> Time.now.strftime("%Y-%m-%d at %I:%m %P")
=> "2025-09-26 at 12:09 pm"
irb(main):003> Time.now.strftime("%Y-%m-%d at %I:%M %P")
=> "2025-09-26 at 12:33 pm"
irb(main):004> RUBY_ENGINE
=> "ruby"
irb(main):005> RUBY_ENGINE_VERSION
=> "3.4.5"