added typehints for the reload mixin

plugins/module_utils/module.py

@@ -348,6 +348,9 @@ def installable(_class: Type[SystemdUnitModule]):
 
 
 class SystemdReloadMixin:
+    module: basic.AnsibleModule
+    unitfile: pathlib.Path
+    changed: bool
     def post(self):
         if not self.changed:
             return