Issue #2999719 by mandclu, ifrik, tim.plunkett, Kristen Pol, xjm, AaronMcHale,...

Issue #2999719 by mandclu, ifrik, tim.plunkett, Kristen Pol, xjm, AaronMcHale, DyanneNova, phenaproxima: Update the Layout Builder module description and clarify how it differs from Field Layout

core/modules/layout_builder/layout_builder.info.yml

 name: 'Layout Builder'
 type: module
-description: 'Provides layout building utility.'
+description: 'Allows users to add and arrange blocks and content fields directly on the content.'
 package: Core (Experimental)
 version: VERSION
 core: 8.x