Modifed abstract and subtitle

Author: Mariya Pershina

docs/cli-guide/master-docinfo.xml

@@ -1,9 +1,9 @@
 <title>CLI Guide</title>
 <productname>{DocInfoProductName}</productname>
 <productnumber>{DocInfoProductNumber}</productnumber>
-<subtitle>Learn how to use the {ProductName} {CLIName} to migrate your applications.</subtitle>
+<subtitle>Using the {ProductName} command-line interface to migrate your applications</subtitle>
 <abstract>
-    <para>This guide describes how to use the {ProductName} {CLIName} to simplify migration of Java applications.</para>
+    <para>By using the {ProductFullName} command-line interface (CLI), you can assess and prioritize migration and modernization efforts for applications written in different languages. You can use the CLI to customize {ProductShortName} analysis options or integrate with external automation tools.</para>
 </abstract>
 <authorgroup>
     <orgname>Red Hat Customer Content Services</orgname>