Update dependency puppetlabs/firewall to v8.1.6

Author: renovate[bot]

Puppetfile

@@ -58,7 +58,7 @@ mod 'puppetlabs/concat', '9.1.0'
 mod 'puppetlabs/cron_core', '1.3.0'
 mod 'puppetlabs/docker', '10.3.0'
 mod 'puppetlabs/facts', '1.7.0'
-mod 'puppetlabs/firewall', '8.1.5'
+mod 'puppetlabs/firewall', '8.1.6'
 mod 'puppetlabs/host_core', '1.3.0'
 mod 'puppetlabs/inifile', '6.2.0'
 mod 'puppetlabs/java', '11.1.0'