README: Fix name of jar file in standalone build

Change-Id: I03d5858923afb59b7b0896f7e0bd16e79d069de3
diff --git a/README.md b/README.md
index adafb42..9056d47 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@
 Install
 -------
 
-Copy the `bazel-genfiles/gerrit-oauth-provider.jar` to
+Copy the `bazel-genfiles/oauth.jar` to
 `$gerrit_site/plugins` and re-run init to configure it:
 
 ```