Update readme to use HTTPS instead of git protocol

GitHub disabled the git protocol as of Jan 11, 2022
See https://github.blog/2021-09-01-improving-git-protocol-security-github/#no-more-unauthenticated-git

Change-Id: Ic50ed9156aae6a76935243ddd7d942f3a0e18d8a
1 file changed
tree: bdb95b152c829a8d1296025ab52803fd362a01e3
  1. snippets/
  2. default.xml
  3. README.mkdn