BKDK-469 changing gallery slide migration mapping

Author: stankut

web/modules/custom/ballerup_d7_migration/config/install/migrate_plus.migration.ballerup_d7_node_gallery_slide.yml

@@ -62,7 +62,7 @@ process:
       - createUrlFromNid
     source: nid
   field_os2web_page_intro: field_deck
-  field_os2web_page_heading: field_navn3
+  field_os2web_page_heading: title
   field_os2web_page_section:
     plugin: migration_lookup
     migration: ballerup_d7_taxonomy_section