Change to https link.

Author: HonkingGoose

book/01-introduction/sections/installing.asc

@@ -59,7 +59,7 @@ You can download that tool from the GitHub for Mac website, at https://desktop.g
 
 There are also a few ways to install Git on Windows.(((Windows, installing)))
 The most official build is available for download on the Git website.
-Just go to http://git-scm.com/download/win[] and the download will start automatically.
+Just go to https://git-scm.com/download/win[] and the download will start automatically.
 Note that this is a project called Git for Windows, which is separate from Git itself; for more information on it, go to https://git-for-windows.github.io/[].
 
 To get an automated installation you can use the https://chocolatey.org/packages/git[Git Chocolatey package].