[update] change log for getTaskResources() and setSkin()

Author: mafanya23

data/api/gantt_gettaskresources.md

@@ -40,6 +40,6 @@ api/gantt_process_resource_assignments_config.md
 
 @relatedsample: 11_resources/13_resource_assignments_for_days.html
 
-@changelog: added in v9.0
+@changelog: added in v8.0
 
 @edition: pro

data/api/gantt_setskin.md

@@ -29,3 +29,5 @@ gantt.skin = "dark";
 @relatedsample:
 	06_skins/10_dark.html
 
+@changelog:
+added in v9.0