Update q4os to 4.6

roles/netbootxyz/templates/menu/live-q4os.ipxe.j2

@@ -6,15 +6,15 @@ goto ${menu} ||
 set os Q4OS Live
 menu ${os}
 item --gap ${os} Versions
-item 3.12 ${space} ${os} 3.12
+item 4.6 ${space} ${os} 4.6
 choose live_version || goto live_exit
 menu ${os} ${live_version}
 item --gap ${os} Flavors
 goto ${live_version}
 
-:3.12
+:4.6
 {% for key, value in endpoints.items() | sort %}
-{% if value.os == "Q4OS" and 'squash' in key and value.version == "3.12" %}
+{% if value.os == "Q4OS" and 'squash' in key and value.version == "4.6" %}
 item {{ key }} ${space} {{ value.os | title }} {{ value.version }} {{ value.flavor | title}}
 {% endif %}
 {% endfor %}