Default value for bastille_network_pf_table is ignored[BUG]

[voh9eepah]

[MANDATORY] Describe the bug [MANDATORY]
When variable bastille_network_pf_table is not initialized in bastille.conf, then default value jails is not used.

[MANDATORY] Bastille and FreeBSD version (paste bastille -v && freebsd-version -kru output)
0.10.20231125
13.2-RELEASE-p10
13.2-RELEASE-p10
13.2-RELEASE-p10

[MANDATORY] How did you install bastille? (port/pkg/git)
pkg

[optional] Steps to reproduce?

1. From bastille.conf comment out the line
   bastille_network_pf_table="jails" ## default: "jails"
2. Start the jail:
   bastille start svelte
   This gives output:
   pfctl: Invalid argument. [svelte]: svelte: created
3. Output from
   pfctl -t jails -T show
   is empty.

[optional] Expected behavior
The output of the command bastille start .. must not give a warning from pfctl and table jails should not be empty.

[optional] Screenshots
If applicable, add screenshots to help explain your problem.

[optional] Additional context
Add any other context about the problem here.