Fix Slack announcement for public default channel (#73)
We have found that the Slack announcement does not work correctly for public channels when the channel parameter is given. The action has been updated to omit the default if no channel is specified, so that announcements to the default channel work correctly even if it is public.
[4.0.3]
Fixed
channel
parameter is given. The action has been updated to omit the default if no channel is specified, so that announcements to the default channel work correctly even if it is public.