Fixes slack badge link (#141)
Fixes slack badge link (#141)

The badge link was missing http and was linking to a relative path
yesdr/haul,callstack-io/haul,callstack-io/haul,callstack-io/haul,yesdr/haul,callstack-io/haul,yesdr/haul,callstack-io/haul,yesdr/haul,yesdr/haul