Add license keys for Bloom and GDS to Additional files to back up (#1540) (#1542)

Co-authored-by: NataliaIvakina <[email protected]>

Author: renetapopova

modules/ROOT/pages/backup-restore/planning.adoc

@@ -208,6 +208,7 @@ If you have a cluster deployment, you should back up the configuration file for
 The locations of these are described in xref:security/ssl-framework.adoc[SSL framework].
 If you have a cluster, you should back up these files for each cluster member.
 * If using custom plugins, make sure that you have the plugins in a safe location.
+* If using Bloom or GDS Enterprise, back up license key files for these products as well.
 
 [[backup-planning-storage]]
 == Storage considerations