[ci] use alternate bash comparison
[ci] use alternate bash comparison

The pattern `echo str | grep -qE pattern` likes to fail on the z CI here for
an unknown reason. Use `grep -qE pattern <<< str` instead.

Signed-off-by: Christopher Jones <da8482a61c3a314f69bc15b69175fd62d9234b97@linux.vnet.ibm.com>

nawawi/docker,cpuguy83/docker,paralin/docker,rremer/moby,allencloud/docker,moby/moby,bearstech/moby,dccurtis/docker,vdemeester/docker,crosbymichael/docker,johnstep/moby-moby,allencloud/docker,unclejack/docker,maxamillion/docker,cpuguy83/docker,dccurtis/docker,thaJeztah/docker,tonistiigi/docker,estesp/docker,dims/docker,Ramzec/docker,flavio/docker,johnstep/moby-moby,duglin/docker,jthelin/docker,tophj-ibm/docker,nawawi/docker,kojiromike/docker,tonistiigi/docker,x1022as/docker,jvanz/docker,dmcgowan/docker,paralin/docker,vdemeester/docker,x1022as/docker,yosifkit/docker,vdemeester/docker,dims/docker,KarthikNayak/docker,kolyshkin/moby,maxamillion/docker,moul/docker,thaJeztah/docker,laijs/docker,dccurtis/docker,konstruktoid/docker-upstream,estesp/docker,noironetworks/docker,mixja/docker,AkihiroSuda/docker,KarthikNayak/docker,tonistiigi/docker,ibuildthecloud/docker,yongtang/docker,mahak/docker,YuPengZTE/docker,justincormack/docker,trebonian/docker,rhatdan/docker,jimjag/docker,jameszhan/docker,mahak/docker,scotttlin/docker,yosifkit/docker,konstruktoid/docker-upstream,rancher/docker,justincormack/docker,flavio/docker,dmcgowan/docker,ibuildthecloud/docker,jlhawn/docker,thaJeztah/docker,laijs/docker,ripcurld0/moby,yosifkit/docker,trebonian/docker,moul/docker,konstruktoid/docker-1,scotttlin/docker,rremer/moby,mikebrow/docker,djs55/docker,dmcgowan/docker,jthelin/docker,rancher/docker,kolyshkin/moby,paralin/docker,jwhonce/docker,yongtang/docker,thaJeztah/docker,rremer/moby,Ramzec/docker,trebonian/docker,ibuildthecloud/docker,cpuguy83/docker,konstruktoid/docker-upstream,jvanz/docker,mahak/docker,ripcurld0/moby,konstruktoid/docker-1,bearstech/moby,x1022as/docker,bearstech/moby,ripcurld0/moby,paralin/docker,tmp6154/docker,trebonian/docker,flavio/docker,flavio/docker,nalind/docker,KingEmet/docker,gnailuy/docker,crosbymichael/docker,YuPengZTE/docker,mixja/docker,djs55/docker,pradipd/moby,tophj-ibm/docker,laijs/moby,nalind/docker,scotttlin/docker,gnailuy/docker,mixja/docker,johnstep/moby-moby,moby/moby,whuwxl/docker,duglin/docker,whuwxl/docker,nawawi/docker,kolyshkin/docker,ibuildthecloud/docker,allencloud/docker,nalind/docker,jwhonce/docker,kolyshkin/docker,moby/moby,kojiromike/docker,jameszhan/docker,Mokolea/docker,bearstech/moby,docker/docker,nalind/docker,laijs/docker,YuPengZTE/docker,jimjag/docker,cpuguy83/docker,noironetworks/docker,dims/docker,Mokolea/docker,jimjag/docker,Ramzec/docker,noironetworks/docker,tophj-ibm/moby,SvenDowideit/docker,AkihiroSuda/docker,moul/docker,rhatdan/docker,pradipd/moby,jwhonce/docker,tophj-ibm/moby,whuwxl/docker,rancher/docker,gnailuy/docker,tophj-ibm/moby,AkihiroSuda/docker,konstruktoid/docker-upstream,unclejack/docker,yongtang/docker,KingEmet/docker,SvenDowideit/docker,moul/docker,duglin/docker,mikebrow/docker,yosifkit/docker,tmp6154/docker,KingEmet/docker,docker/docker,kolyshkin/moby,nawawi/docker,jvanz/docker,konstruktoid/docker-1,docker/docker,moby/moby,djs55/docker,Mokolea/docker,AkihiroSuda/docker,kojiromike/docker,rhatdan/docker,estesp/docker,laijs/moby,jameszhan/docker,pradipd/moby,ibuildthecloud/docker,laijs/moby,jlhawn/docker,Mokolea/docker,crosbymichael/docker,justincormack/docker,gnailuy/docker,unclejack/docker,SvenDowideit/docker,jlhawn/docker,Ramzec/docker,KarthikNayak/docker,maxamillion/docker,mahak/docker,tophj-ibm/docker,jimjag/docker,mikebrow/docker,tmp6154/docker