Fixup! beacons/avahi_announce.py finding grains
Fixup! beacons/avahi_announce.py finding grains

This pull resquest broke the avahi_announce
https://github.com/saltstack/salt/pull/45657
because len('grains.') is 7 and not 6 as this
change say.
What happens now is that is looking in
__grains__ for '.{grain_name}' instead of {grain_name}.

Signed-off-by: Rares POP <d9574b758dce7f8f35eefd365cd2a75dda907696@ni.com>

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt