[Fix]: Property PhysicalContext is invalid "none"

Issue: Redfish validator is throwing error "PhysicalContext:
This type is invalid none" for multiple temperature sensors

Endpoint : /redfish/v1/Chassis/<Baseboard>/Thermal#/Temperatures/

Root Cause : PhysicalContext Schema was missing from redfish schema
metadata

Tested: Redfish validator script passed.

*** /redfish/v1/Chassis/<baseboard>/Thermal#/Temperatures/0
         Type (#Thermal.v1_3_0.Temperature), GET SUCCESS (time: 0)
         PASS

Signed-off-by: sunitakx <sunitax.kumari@intel.com>
Change-Id: Ifbfe7d96e99030c0c5ba67a1aba5080cd049e57b
diff --git a/scripts/update_schemas.py b/scripts/update_schemas.py
index eb6318f..3f0f57c 100755
--- a/scripts/update_schemas.py
+++ b/scripts/update_schemas.py
@@ -65,6 +65,7 @@
     'PCIeDeviceCollection',
     'PCIeFunction',
     'PCIeFunctionCollection',
+    'PhysicalContext',
     'Power',
     'Privileges',  # Used in Role
     'Processor',