Changes to Render a saved template

added the new optional request property lang

added the new optional request property pdf_standard

added the new optional request property title

added the optional property allOf[#/components/schemas/StoredPdf]/conformance to the response with the 200 status

added the optional property allOf[#/components/schemas/StoredPdf]/pdf_standard to the response with the 200 status

added the optional property allOf[#/components/schemas/StoredPdf]/pdf_standard_stability to the response with the 200 status