Update Slack secret configuration (#9141)
Update Slack secret configuration (#9141)

The first one was wrongly generated using my fork
instead of playframework/playframework.
marcospereira/playframework,mkurz/playframework,wegtam/playframework,benmccann/playframework,benmccann/playframework,wegtam/playframework,benmccann/playframework,playframework/playframework,marcospereira/playframework,marcospereira/playframework,playframework/playframework,mkurz/playframework,wegtam/playframework,playframework/playframework,mkurz/playframework,marcospereira/playframework,mkurz/playframework,wegtam/playframework,benmccann/playframework