style 💎: Remove unnecessary blank line from fail2ban.yml

This commit removes an unnecessary blank line from the `fail2ban.yml` file to clean up the code style and improve readability.

tasks/fail2ban.yml

@@ -152,7 +152,7 @@
   ansible.builtin.command: pve-firewall compile
   register: fw_compile_check
   changed_when: false
-  
+
 # Then automatically whitelist it in Fail2Ban:
 # ignoreip = 127.0.0.1/8 {{ corosync_ip.stdout }}