Changes to Get Vendors

the response property items/items/company_website became optional for the status 200

the response property items/items/subcontractors/items/company_website became optional for the status 200

response property items/items/company_website list-of-types was widened by adding types null to media type application/json of response 200

response property items/items/subcontractors/items/company_website list-of-types was widened by adding types null to media type application/json of response 200