PEL: Fix spelling mistake in msg registry

This shows up in peltool output.

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I7d2e546bb6475572177490ce94d69d2db0e942ff
diff --git a/extensions/openpower-pels/registry/message_registry.json b/extensions/openpower-pels/registry/message_registry.json
index fcb0850..b2a1759 100644
--- a/extensions/openpower-pels/registry/message_registry.json
+++ b/extensions/openpower-pels/registry/message_registry.json
@@ -108,7 +108,7 @@
             "Documentation":
             {
                 "Description": "An operation failed because it isn't allowed",
-                "Message": "An operation failed becuase it isn't allowed",
+                "Message": "An operation failed because it isn't allowed",
                 "Notes": [
                     "The journal should contain more information"
                 ]