MDEP-913 Add dependency:collect on index-page

src/site/apt/index.apt.vm

@@ -53,6 +53,10 @@ ${project.name}
   Maven to output the path of the dependencies from the local repository in a classpath format to be used in java -cp.
   The classpath file may also be attached and installed/deployed along with the main artifact.
 
+  *{{{./collect-dependencies-mojo.html}dependency:collect}} collects the project dependencies from the repository.
+  It lists the groupId:artifactId:version information by downloading the pom files without downloading the actual
+  artifacts such as jar files.
+
   *{{{./copy-mojo.html}dependency:copy}} takes a list of artifacts defined in the plugin configuration section and
   copies them to a specified location, renaming them or stripping the version if desired. This goal can resolve
   the artifacts from remote repositories if they don't exist in either the local repository or the reactor.