Updated windows.md

[Gyrohammer]

This is a 🔦 documentation change.

Summary

I updated the ruby versions and gem update command.

Context

Ruby is now at v2.7.x and some of the packages (gems? New to ruby sorry) Jekyll uses are incompatible with 2.5. I removed 2.5 and installed 2.7 from the same repository listed in the doc. Jekyll then failed install since the latest sass-embedded wasnt supported on RubyGems 3.1.6. To update RubyGems I then had to run gem update --system which resolved the issue and let me install Jekyll. This was all performed on Windows 11 via WSL.

[ashmaroli]

I agree with you, @Gyrohammer.
Even though Jekyll Core codebase is totally compatible with Ruby 2.5, its dependencies need not be so.
Ruby 2.7 itself will be EOL in about 7 weeks. So people just starting out with Ruby / Jekyll tend to install more recent Ruby 3.1 and above.

Are there more changes incoming since you have this as a draft request..?

[Gyrohammer]

Hey there! My apologies I've never contributed to a public project before and got cold feet! I thought a draft wouldnt publish but it did. I looked it up after the fact and saw that 2.7 is EOL, I wasnt aware before I published this. I wasnt planning to do anything more with this so the draft was just a mistake on my part, sorry for the confusion.

[ashmaroli]

No worries, @Gyrohammer. The very first time is always filled with apprehensions. :)

Regarding the proposed changes, I think gem update --system wouldn't be necessary if the user is installing Ruby 3.1 or newer.
Will you be able to check and make changes here if necessary?