redfish-schema: add Protocol

The Drive schema indirectly references Protocol, but it is missing
from the schema list.  Modify `update_schemas.py` to include it and
run, checking in the results.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ic3adad00924d450d3b7062c94ec04fc26e4cc9b9
diff --git a/scripts/update_schemas.py b/scripts/update_schemas.py
index 3d8fb03..bf39579 100755
--- a/scripts/update_schemas.py
+++ b/scripts/update_schemas.py
@@ -101,6 +101,7 @@
     "Privileges",  # Used in Role
     "Processor",
     "ProcessorCollection",
+    "Protocol",
     "RedfishError",
     "RedfishExtensions",
     "Redundancy",