Update README.adoc

Author: bitwiseman

README.adoc

@@ -16,7 +16,7 @@ There's no need to install this plugin manually, although you want to keep it up
 == Note to plugin developers
 
 If you are developing a plugin that depends on http://kohsuke.org/github-api[github-api],
-it's is highly recommended that you depend on this pluging as opposed to bundle the jar locally.
+it's is highly recommended that you depend on this plugin as opposed to bundle the jar locally.
 Doing so (as opposed to depending on `+org.kohsuke:github-api+` as a jar),
 we can eliminate the classloader problems caused by having multiple copies of github-api loaded.
 Specifically, if plugin A and B both locally includes its own copy of the `+github-api.jar+` and another plugin C depends on A and B, it'll break.