update docs require_reboot

docs/20_Checks/check_reboot_required.md

@@ -28,8 +28,25 @@ PARAMETERS:
 
 ## Examples
 
-`check_cronstatus`
-    The Check of cronjobs with the default loction does not require any parameter
+### No reboot needed
 
-`check_cronstatus /usr/share/cronwrapper/cronstatus.sh`
-    The Check of cronjobs with custom loction.
+```txt
+./check_reboot_required 
+OK: [centos] no reboot required (kernel is up to date: 4.18.0-500.el8.x86_64)
+```
+
+### Reboot needed
+
+On CentOs we check an updated kernel
+
+```txt
+./check_reboot_required 
+WARNING: [centos] need to reboot for kernel package   kernel is not installed (current: 4.18.0-193.el8.x86_64)
+```
+
+### Not supported OS: unknown
+
+```txt
+./check_reboot_required
+UNKNOWN: distro [manjaro] was detected but is not supported (yet).
+```