Update CONTRIBUTING.md (#1232)

* Update CONTRIBUTING.md

Removing the word of from the hyperlink text that goes to the issues tab. It doesn't need to be there.

CONTRIBUTING.md

@@ -13,12 +13,12 @@ dedicated, but not as active, channel.
 
 ### Taking on Tasks
 
-We have a growing task list
-[of issues](https://github.com/LAION-AI/Open-Assistant/issues). Find an issue
-that appeals to you and make a comment that you'd like to work on it. Include in
-your comment a brief description of how you'll solve the problem and if there
-are any open questions you want to discuss. Once a project coordinator has
-assigned the issue to you, start working on it.
+We have a growing task list of
+[issues](https://github.com/LAION-AI/Open-Assistant/issues). Find an issue that
+appeals to you and make a comment that you'd like to work on it. Include in your
+comment a brief description of how you'll solve the problem and if there are any
+open questions you want to discuss. Once a project coordinator has assigned the
+issue to you, start working on it.
 
 If the issue is currently unclear but you are interested, please post in Discord
 and someone can help clarify the issue with more detail.