Fix spelling

Author: karlhorky

README.md

@@ -23,7 +23,7 @@ dependencies {
 
 The are a few important components this package provides:
 
-* GraphQLQueryProvider/GrapgQLMutationProvider interfaces. These will allow you
+* GraphQLQueryProvider/GraphQLMutationProvider interfaces. These will allow you
   to define which "domain model" views and which mutations you are going to expose.
 * GraphQLServlet as an entry point servlet. Use `bindQueryProvider`/`bindMutationProvider` or automatically wire
 them in OSGi.