[stable-2.9] reboot - fix Void Linux (#70704) (#70917)

Add entry for appropriate commands for Void Linux
(cherry picked from commit 4cc4cebc97)

Co-authored-by: fosslinux <fosslinux@aussies.space>

changelogs/fragments/70704-void-linux-reboot.yml

@@ -0,0 +1,3 @@
+bugfixes:
+ - reboot - Add support for the runit init system, used on Void Linux, that
+   does not support the normal Linux syntax.

lib/ansible/plugins/action/reboot.py

@@ -57,6 +57,7 @@ class ActionModule(ActionBase):
 
     SHUTDOWN_COMMAND_ARGS = {
         'alpine': '',
+        'void': '-r +{delay_min} "{message}"',
         'freebsd': '-r +{delay_sec}s "{message}"',
         'linux': DEFAULT_SHUTDOWN_COMMAND_ARGS,
         'macosx': '-r +{delay_min} "{message}"',