Documentation: Fix the in-tree bazel test command

Change-Id: I873369321a9c2b18f7746a2003bf722ef3de659a
diff --git a/src/main/resources/Documentation/build.md b/src/main/resources/Documentation/build.md
index f4e61d9..585244f 100644
--- a/src/main/resources/Documentation/build.md
+++ b/src/main/resources/Documentation/build.md
@@ -83,7 +83,7 @@
 To execute the tests run:
 
 ```
-  bazel test --test_tag_filters=@PLUGIN@
+  bazel test --test_tag_filters=@PLUGIN@ //...
 ```
 
 How to build the Gerrit Plugin API is described in the [Gerrit