Fix broken links to Git book.

Author: mergenci

README.md

@@ -13,7 +13,7 @@ the following resources are a great place to start:
 
 [man]: http://git-scm.com/docs/gitignore
 [help]: https://help.github.com/articles/ignoring-files
-[chapter]: https://git-scm.com/book/en/Git-Basics-Recording-Changes-to-the-Repository#_ignoring
+[chapter]: https://git-scm.com/book/en/v2/Git-Basics-Recording-Changes-to-the-Repository#_ignoring
 [progit]: http://git-scm.com/book
 
 ## Folder structure

community/Alteryx.gitignore

@@ -29,7 +29,7 @@ CASS.ini
 *.gzlc
 
 ## gitignore reference sites
-# https://git-scm.com/book/en/v2/Git-Basics-Recording-Changes-to-the-Repository#Ignoring-Files
+# https://git-scm.com/book/en/v2/Git-Basics-Recording-Changes-to-the-Repository#_ignoring
 # https://git-scm.com/docs/gitignore
 # https://help.github.com/articles/ignoring-files/