build.md: Correct in-tree test command

Change-Id: Iff17be4a87b058eeabc30faf774c04e26f9d51ea
diff --git a/src/main/resources/Documentation/build.md b/src/main/resources/Documentation/build.md
index b47afaa..a61ad8c 100644
--- a/src/main/resources/Documentation/build.md
+++ b/src/main/resources/Documentation/build.md
@@ -68,7 +68,7 @@
 To execute the tests run:
 
 ```
-  bazel test plugins/@PLUGIN@:delete_project_tests
+  bazel test plugins/@PLUGIN@:delete-project_tests
 ```
 
 or filtering using the comma separated tags: