Update title to match other SDK repos

Author: beeme1mr

README.md

@@ -1,5 +1,5 @@
-# Java SDK
+# OpenFeature SDK for Java
 
 This is an experimental Java SDK. The main motivation at the moment is to square away the API surface area to 
 ensure the work we're doing in typescript can be replicated in a less flexible language. This may become the official
-Java SDK eventually, but now is not that time.
+Java SDK eventually, but now is not that time.