Bump 9.4 to rc1
Bump 9.4 to rc1

dictybase-docker/postgres,teamscala/docker-postgres,lfittl/postgres-docker,wmark/docker-official-postgres,acmk01/docker-postgres,aledade/postgres,gouravnema/postgres,bordin/postgres,infosiftr/postgres,DanielDent/docker-postgres,hkjn/postgres,qatsi/docker-postgres,notnoopci/postgres,vartana/postgres,ceagan/postgres-postgis,gamesbrainiac/postgres,sashaegorov/docker-postgres,docker-library/postgres