Add missing colon for documentation build steps.
Add missing colon for documentation build steps.

Change-Id: I9ecb5d945d950e44c918469ab2ae0478e22bc1a8

rickerc/keystone_audit,cloudbau/keystone,promptworks/keystone,blueboxgroup/keystone,citrix-openstack-build/keystone,vivekdhayaal/keystone,maestro-hybrid-cloud/keystone,openstack/keystone,promptworks/keystone,UTSA-ICS/keystone-kerberos,kwss/keystone,citrix-openstack-build/keystone,jumpstarter-io/keystone,cloudbau/keystone,openstack/keystone,ntt-sic/keystone,dsiddharth/access-keys,klmitch/keystone,dstanek/keystone,citrix-openstack-build/keystone,nuxeh/keystone,dstanek/keystone,reeshupatel/demo,jamielennox/keystone,rajalokan/keystone,cbrucks/Federated_Keystone,reeshupatel/demo,derekchiang/keystone,nuxeh/keystone,mahak/keystone,MaheshIBM/keystone,derekchiang/keystone,blueboxgroup/keystone,rodrigods/keystone,idjaw/keystone,cloudbau/keystone,rajalokan/keystone,reeshupatel/demo,kwss/keystone,cernops/keystone,jamielennox/keystone,dsiddharth/access-keys,takeshineshiro/keystone,nuxeh/keystone,jumpstarter-io/keystone,rodrigods/keystone,roopali8/keystone,dims/keystone,kwss/keystone,roopali8/keystone,ilay09/keystone,mahak/keystone,ntt-sic/keystone,ilay09/keystone,rushiagr/keystone,ntt-sic/keystone,vivekdhayaal/keystone,dsiddharth/access-keys,townbull/keystone-dtrust,JioCloud/keystone,jonnary/keystone,dstanek/keystone,cernops/keystone,rickerc/keystone_audit,idjaw/keystone,ging/keystone,rushiagr/keystone,maestro-hybrid-cloud/keystone,rushiagr/keystone,dims/keystone,JioCloud/keystone,derekchiang/keystone,cbrucks/Federated_Keystone,cbrucks/Federated_Keystone,openstack/keystone,promptworks/keystone,ging/keystone,ajayaa/keystone,MaheshIBM/keystone,mahak/keystone,himanshu-setia/keystone,ajayaa/keystone,himanshu-setia/keystone,rickerc/keystone_audit,klmitch/keystone,vivekdhayaal/keystone,rajalokan/keystone,townbull/keystone-dtrust,townbull/keystone-dtrust,ilay09/keystone,jonnary/keystone,UTSA-ICS/keystone-kerberos,jumpstarter-io/keystone,takeshineshiro/keystone