Use native error wrapping (#1098)

Author: alexandear

oapi_validate.go

@@ -157,7 +157,7 @@ func ValidateRequestFromContext(c *gin.Context, router routers.Router, options *
 default:
 // This should never happen today, but if our upstream code changes,
 // we don't want to crash the server, so handle the unexpected error.
-return fmt.Errorf("error validating request: %s", err)
+return fmt.Errorf("error validating request: %w", err)
 }
 }
 return nil