🐛 Fix return type to void for "No content" http responses

Author: mashabek

starter/api/rest/src/view/rest/util/openapi.util.ts

@@ -170,7 +170,7 @@ type MimeContentValue<
 type OpenApiContentTypes<OpenApiContent extends Record<number, any>> = {
   [K in keyof OpenApiContent]: OpenApiContent[K] extends Content
     ? MimeContentValue<ApiMimeTypes, OpenApiContent[K]>
-    : never
+    : void
 }[keyof OpenApiContent]
 
 export type OperationParams<OperationId extends OperationIds> =