Update documentation_change.md

.github/ISSUE_TEMPLATE/documentation_change.md

@@ -6,6 +6,7 @@ labels: ''
 assignees: ''
 
 ---
+<!-- If you perfer, you can make a PR to https://github.com/ArchiveBox/docs instead of opening an issue -->
 
 ## Wiki Page URL
 <!-- e.g. https://github.com/pirate/ArchiveBox/wiki/Configuration#use_color -->