Jarek Radosz 0a259b94f0 DEV: Fix an ActiveModel::Errors deprecation
The warning was:

DEPRECATION WARNING: Calling `<<` to an ActiveModel::Errors message array in order to add an error is deprecated. Please call `ActiveModel::Errors#add` instead. (called from block (3 levels) in activate! at discourse/plugins/poll/plugin.rb:519)
2021-06-07 11:34:38 +08:00
..
2021-05-25 15:29:11 +02:00