Make more descriptive appdata summary field

resources/linux/code.appdata.xml

@@ -5,7 +5,7 @@
 	<project_license>@@LICENSE@@</project_license>
 	<name>@@NAME_LONG@@</name>
 	<url type="homepage">https://code.visualstudio.com</url>
-	<summary>Code editing. Redefined.</summary>
+	<summary>Visual Studio Code. Code editing. Redefined.</summary>
 	<description>
 		<p>Visual Studio Code is a new choice of tool that combines the simplicity of a code editor with what developers need for the core edit-build-debug cycle. See https://code.visualstudio.com/docs/setup/linux for installation instructions and FAQ.</p>
 	</description>