fixed dead link

Peter Bødskov · Peter Bødskov · commit 7104156ae393 · 2013-11-21T14:32:15.000+01:00
diff --git a/resources/_posts/2001-01-01-shell-prompts.md b/resources/_posts/2001-01-01-shell-prompts.md
@@ -7,7 +7,7 @@ path: resources/_posts/2001-01-01-shell-prompts.md
 
 Recent installations of MSysGit include a bash prompt that indicates the current branch and working tree status.
 
-* [Git's official shell completion](https://github.com/github/git/blob/github/contrib/completion/git-completion.bash)
+* [Git's official shell completion](https://github.com/git/git/blob/master/contrib/completion/git-completion.bash)
 * [Git Training Shell Prompts](https://github.com/github/teach.github.com/tree/gh-pages/examples/shellprompts)
 * [Robby Russell's oh-my-zsh • Git Enabled ZShell Prompts](http://github.com/robbyrussell/oh-my-zsh)
 * [Matthew's Bash and ZShell Scripts](https://github.com/matthewmccullough/scripts)
