style 💎: Remove trailing whitespace from f2b_unban_ip comment

Cleaned up the code by removing unnecessary trailing whitespace from a comment in the defaults/main.yml file.

defaults/main.yml

@@ -59,4 +59,4 @@ f2b_ipset_name: f2b-blacklist
 f2b_bantime_increment: true
 f2b_bantime_factor: 2
 f2b_bantime_max: 86400
-f2b_unban_ip: ""              # ansible-playbook play.yml -e f2b_unban_ip=192.168.1.55
+f2b_unban_ip: ""              # ansible-playbook play.yml -e f2b_unban_ip=192.168.1.55

tasks/fail2ban.yml

@@ -288,4 +288,4 @@
 - name: fail2ban | Report unban result
   ansible.builtin.debug:
     msg: "Unbanned IP {{ f2b_unban_ip }}"
-  when: f2b_unban_ip | length > 0
+  when: f2b_unban_ip | length > 0