fix octokit link

_posts/2010-04-23-libraries.markdown

@@ -92,10 +92,10 @@ The [github-party][gh-party] library is also using the v1 API.
 #### API Version 2 ####
 
 The [octopi][octopi] library is one of the first emerging for the
-GitHub API v2. There's also [octopussy][op], and the small [hubruby][hubruby].
+GitHub API v2. There's also [octokit][op], and the small [hubruby][hubruby].
 
 [octopi]: http://github.com/fcoury/octopi/
-[op]: http://github.com/pengwynn/octopussy
+[op]: http://github.com/pengwynn/octokit
 [hubruby]: http://github.com/diogenes/hubruby
 
 #### Web scraping ####
@@ -119,4 +119,4 @@ Based on a gist by [tekkub][tekkub].
 
 [CocoaREST]: http://github.com/ctshryock/CocoaREST
 [GitHubObjC]: http://github.com/ernstsson/GitHubObjC
-[UAGithubEngine]: http://github.com/owainhunt/UAGithubEngine
+[UAGithubEngine]: http://github.com/owainhunt/UAGithubEngine