doc: Correct required firewalld version (#76916)

Ansible 2.9 firewalld module docs state 'requires firewalld >= 3.0.9,' but there is no firewalld 3.0.9.

Language appears to have been added in 3ac2a498ae, which commits also adds 'if FW_VERSION < "0.3.9"

Update documentation to refer to 'firewalld >= 0.3.9'

lib/ansible/modules/system/firewalld.py

@@ -63,7 +63,7 @@ options:
   permanent:
     description:
       - Should this configuration be in the running firewalld configuration or persist across reboots.
-      - As of Ansible 2.3, permanent operations can operate on firewalld configs when it is not running (requires firewalld >= 3.0.9).
+      - As of Ansible 2.3, permanent operations can operate on firewalld configs when it is not running (requires firewalld >= 0.3.9).
       - Note that if this is C(no), immediate is assumed C(yes).
     type: bool
   immediate: