REST-cheatsheet: Fix typo

Fixup a typo in the Boot Mode command to save the next person wondering
why the command is generating backtraces.

Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
Change-Id: I38756dbf1da05bfc43b504e93905b29c86dd8290
diff --git a/REST-cheatsheet.md b/REST-cheatsheet.md
index 8815f55..1f9e1a5 100644
--- a/REST-cheatsheet.md
+++ b/REST-cheatsheet.md
@@ -145,7 +145,7 @@
 
 * Set boot mode:
     ```
-    $ curl -b cjar -k -H "Content-Type: application/json" -X PUT https://${bmc}/xyz/openbmc_project/control/host0/boot/one_time/attr/BootMode -d '{"data": "xy.openbmc_project.Control.Boot.Mode.Modes.Regular"}'
+    $ curl -b cjar -k -H "Content-Type: application/json" -X PUT https://${bmc}/xyz/openbmc_project/control/host0/boot/one_time/attr/BootMode -d '{"data": "xyz.openbmc_project.Control.Boot.Mode.Modes.Regular"}'
     ```
 
 * Set boot source: