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/redfish-core/include/schemas.hpp b/redfish-core/include/schemas.hpp
index 0d47c6f..7302876 100644
--- a/redfish-core/include/schemas.hpp
+++ b/redfish-core/include/schemas.hpp
@@ -93,6 +93,7 @@
         "Privileges",
         "Processor",
         "ProcessorCollection",
+        "Protocol",
         "redfish-error",
         "redfish-payload-annotations",
         "redfish-schema",