promote slack use for novice and dev channels
promote slack use for novice and dev channels

Signed-off-by: Mike Brown <392d1074b9aea7041f97d21fe1e0b35c6b1de152@us.ibm.com>

ronaldpetty/kubernetes.github.io,rata/kubernetes.github.io,rata/kubernetes.github.io,rata/kubernetes.github.io,aidevops/kubernetes.github.io,aidevops/kubernetes.github.io,aidevops/kubernetes.github.io,aidevops/kubernetes.github.io,rata/kubernetes.github.io,erictune/erictune.github.io,ronaldpetty/kubernetes.github.io,erictune/erictune.github.io,erictune/erictune.github.io,AlainRoy/alainroy.github.io,ronaldpetty/kubernetes.github.io,erictune/erictune.github.io,AlainRoy/alainroy.github.io,erictune/erictune.github.io,AlainRoy/alainroy.github.io,rata/kubernetes.github.io,aidevops/kubernetes.github.io