Bazel: Clarify the deployment of final artifacts

I was getting error reports from Javamelody plugins users, that the
plugin stop working after upgrade to gerrit 2.14 stable. The reason
was the wrong deployment.

Make it clear, where final artifacts need to be deployed in gerrit
site.

Change-Id: I804ad79086af6504de6d38cf5aeb188db531b220
diff --git a/src/main/resources/Documentation/build.md b/src/main/resources/Documentation/build.md
index 582e178..3e97bac 100644
--- a/src/main/resources/Documentation/build.md
+++ b/src/main/resources/Documentation/build.md
@@ -40,6 +40,11 @@
   bazel-bin/plugins/javamelody/javamelody-deps_deploy.jar
 ```
 
+[IMPORTANT]
+Both targets above are required and must be deployed to the right
+locations: `javamelody.jar` to `<gerrit_site>/plugins` directory
+and `javamelody-deps_deploy.jar` to `<gerrit_site>/lib` directory.
+
 This project can be imported into the Eclipse IDE.
 Add the plugin name to the `CUSTOM_PLUGINS` and to the
 `CUSTOM_PLUGINS_TEST_DEPS` set in Gerrit core in