Update change password documentation
Update change password documentation

mfojtik/postgresql,stevekuznetsov/postgresql,sclorg/postgresql-container,praiskup/openshift-postgresql,mfojtik/postgresql,openshift/postgresql,bparees/postgresql,sclorg/container-common-scripts,ibotty/openshift-postgresql,sclorg/container-common-scripts,bparees/postgresql,pkubatrh/postgresql-container,btison/postgresql,rhcarvalho/postgresql,olysonek/postgresql,praiskup/openshift-postgresql