Merge pull request #733 from lazyatom/patch-1

Fix minor typo in README.md

Author: lgebhardt

README.md

@@ -91,7 +91,7 @@ class ContactResource < JSONAPI::Resource
 end
 ```
 
-A jsonapi-resource generator is avaliable
+A jsonapi-resource generator is available
 ```
 rails generate jsonapi:resource contact
 ```