Fix Validator Error for Updateable spelling

https://gerrit.openbmc.org/c/openbmc/bmcweb/+/54577/5/redfish-core/include/utils/sw_utils.hpp#377
changed the spelling of Updateable.
This caused the bmcweb bump to fail the Redfish Validator.
This most likely was just an accident.

The Error is:
ERROR - Updatable not defined in schema SoftwareInventory.v1_1_0 (check
version, spelling and casing)
ERROR - Attempting Updateable (from Updatable)?

Updatable, although more common, is not the Redfish property name.
From https://redfish.dmtf.org/schemas/SoftwareInventory.v1_7_0.json:
"Updateable": {
  "description": "An indication of whether the Update...

Tested: None.

Change-Id: I8d2ab12f26e5df7ee35c5363acf70c1977fbcfdb
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/redfish-core/include/utils/sw_utils.hpp b/redfish-core/include/utils/sw_utils.hpp
index a553808..6ec41c0 100644
--- a/redfish-core/include/utils/sw_utils.hpp
+++ b/redfish-core/include/utils/sw_utils.hpp
@@ -374,7 +374,7 @@
         if (std::find(objPaths.begin(), objPaths.end(), reqSwObjPath) !=
             objPaths.end())
         {
-            asyncResp->res.jsonValue["Updatable"] = true;
+            asyncResp->res.jsonValue["Updateable"] = true;
             return;
         }
         });