typo

Author: Alexander Furer

ReleaseNotes.adoc

@@ -2,6 +2,6 @@
 - gRPC version upgraded to 1.1.1
 - Spring Boot version upgraded to  1.4.4
 - *Breaking API change*: +
-    `void GRpcServerBuilderConfigurer::configure(ServerBuilder<?> serverBuilder)` methods now returns void and overriding of `ServerBuilder` is not supported +
+    `void GRpcServerBuilderConfigurer::configure(ServerBuilder<?> serverBuilder)` method now returns void and overriding of `ServerBuilder` is not supported +
      to prevent potential confusion.