Update changelog

CHANGELOG.md

@@ -5,6 +5,7 @@
 * On update user of for all sites add check if site exists, otherwise update breaks
 * If extraData.images is set then the new value ovreplaces the old value instead of being merged (it waas impossible to delete images)
 * Add min/max number of to budgeting voting
+* Make sure postcode validation doesn't fail on an empty string
 
 ## 0.7.6 (2020-10-07)
 * Votes were viewable when they should not be