How to automate your project and Github repo setup in Windows

I was following the article that shows How to automate your project and Github repo setup . https://www.freecodecamp.org/news/automate-project-github-setup-mac/
The article is about Mac users, but I’m on Windows. I stuck in step 5) Make the shell script executable. When I write this in the terminal chmod +x git-script.sh what I see is: The term ‘chmod’ is not recognized as the name of a cmdlet, function, script file, or operable program.
Anyone knows how to solve this in Windows? Any alternative of chmod in Windows? Is there a way to make script executable in Windows?