modules.nftables: fix str formatting to include 'family' in err msgs properly
modules.nftables: fix str formatting to include 'family' in err msgs properly

************* Module salt.modules.nftables
salt/modules/nftables.py:367: [E1305(too-many-format-args), get_rule_handle] Too many arguments for format string
salt/modules/nftables.py:419: [E1305(too-many-format-args), check] Too many arguments for format string
salt/modules/nftables.py:593: [E1305(too-many-format-args), new_chain] Too many arguments for format string
salt/modules/nftables.py:643: [E1305(too-many-format-args), delete_chain] Too many arguments for format string
salt/modules/nftables.py:687: [E1305(too-many-format-args), append] Too many arguments for format string
salt/modules/nftables.py:744: [E1305(too-many-format-args), insert] Too many arguments for format string
salt/modules/nftables.py:801: [E1305(too-many-format-args), delete] Too many arguments for format string
salt/modules/nftables.py:848: [E1305(too-many-format-args), flush] Too many arguments for format string

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