Redfish cheatsheet: Add BMC reboot

Change-Id: Ifaf1bcf06ff5d7f993fd96134b9ca8220fb79cf9
Tested: Did a BMC reboot
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/REDFISH-cheatsheet.md b/REDFISH-cheatsheet.md
index a108dde..885d281 100644
--- a/REDFISH-cheatsheet.md
+++ b/REDFISH-cheatsheet.md
@@ -65,6 +65,13 @@
 
 ---
 
+## BMC reboot
+```
+curl -k -H "X-Auth-Token: $token" -X POST https://${bmc}/redfish/v1/Managers/bmc/Actions/Manager.Reset -d '{"ResetType": "GracefulRestart"}'
+```
+
+---
+
 ## Log entry
 Display logging entries:
 ```