Fix grafana docs (#10605)

Author: eddumelendez

docs/modules/grafana.md

@@ -10,6 +10,8 @@ You can start a Grafana OTel LGTM container instance from any Java application b
 [Grafana Otel LGTM container](../../modules/grafana/src/test/java/org/testcontainers/grafana/LgtmStackContainerTest.java) inside_block:container
 <!--/codeinclude-->
 
+## Adding this module to your project dependencies
+
 Add the following dependency to your `pom.xml`/`build.gradle` file:
 
 === "Gradle"