How to use gitbash.exe in Windows?

[bukowa]

https://github.com/actions/runner-images/blob/main/images/windows/Windows2022-Readme.md#shells
I tried gitbash, gitbash.exe, full path....
Error: gitbash: command not found

name: "Windows"
jobs:

  windows:
    runs-on: "windows-latest"
    defaults:
      run:
        shell: "gitbash"
    steps:
      - uses: actions/checkout@v4

      - run:
          echo "Hello, Windows!"

[bukowa]

use bash - README is confusing as there are 3 shells with name 'bash' and looks like order of PATH resolution is important wow