Merge pull request #1214 from HonkingGoose/readme_https

Change README.asc to use https link for the book.

Author: ben

README.asc

@@ -2,7 +2,7 @@
 
 Welcome to the second edition of the Pro Git book.
 
-You can find this book online at: http://git-scm.com/book
+You can find this book online at: https://git-scm.com/book
 
 Like the first edition, the second edition of Pro Git is open source under a Creative Commons license.