Update pfsense.rb

[anthonysomerset]

excluding firewall rule created sections when generated automatically via pfblockerNG

Pre-Request Checklist

• Passes rubocop code analysis (try rubocop --auto-correct)
• Tests added or adapted (try rake test)
• Changes are reflected in the documentation
• User-visible changes appended to CHANGELOG.md

Description

PfSense Model Update
This changes adds extra exclusion criteria for config that will change excessively during normal operation, specifically it will exclude the block of firewall rules ONLY when the username is "Auto" - these are rules created by tools such as pfBlockerNG and can update frequently causing high config update churn for pfsense - for manually created rules they are not touched

This could likely be extended to OpnSense but i don't have devices to validate this on

Blocks like this will be removed:

<created>
	<time>1696068193</time>
	<username><![CDATA[Auto]]></username>
</created>

but not like this (manual rule edits by users)

<created>
	<time>1476696788</time>
	<username><![CDATA[admin@<REDACTEDIPADDRESS>:7495]]></username>
</created>

[aschaber1]

@anthonysomerset , please add an entry to the changelog :)

[anthonysomerset]

@aschaber1 done - sorry it took so long :)

[anthonysomerset]

also rebased to fix the merge conflicts ;)