HTTP->HTTPS

Signed-off-by: Junjie Yuan <[email protected]>

Author: junjieyuan

book/01-introduction/sections/installing.asc

@@ -46,7 +46,7 @@ $ git --version
 If you don't have it installed already, it will prompt you to install it.
 
 If you want a more up to date version, you can also install it via a binary installer.
-A macOS Git installer is maintained and available for download at the Git website, at http://git-scm.com/download/mac[].
+A macOS Git installer is maintained and available for download at the Git website, at https://git-scm.com/download/mac[].
 
 .Git macOS Installer.
 image::images/git-osx-installer.png[Git macOS installer.]