code-update/ubi-code-update fix ActivationProgress

tested: copy&pasted the new command: works

Change-Id: I8e2130b090820e46084794a61e9bc2c27fb2b1c9
Signed-off-by: Joseph Reynolds <jrey@us.ibm.com>
diff --git a/code-update/ubi-code-update.md b/code-update/ubi-code-update.md
index ceb056b..1845b94 100644
--- a/code-update/ubi-code-update.md
+++ b/code-update/ubi-code-update.md
@@ -102,7 +102,7 @@
       ```
       busctl get-property xyz.openbmc_project.Software.BMC.Updater  \
         /xyz/openbmc_project/software/<id> \
-        xyz.openbmc_project.Software.Activation Progress
+        xyz.openbmc_project.Software.ActivationProgress Progress
       ```
 
   * Method 2: Using the REST API: