Fix comments value in salt.states.pkgrepo example (#32604)
Fix comments value in salt.states.pkgrepo example (#32604)

'comments' option adds '#' automatically. Example contains `#http://mirror.centos.org/centos/$releasever/os/$basearch/` string which becomes prefixed with '##' in generated file.
saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt