chore: add cause value to createUploadTemplateCsv default error

Author: david-roper

apps/web/src/features/upload/utils.ts

@@ -472,7 +472,9 @@ export function createUploadTemplateCSV(instrument: AnyUnilingualFormInstrument)
       throw e;
     }
 
-    throw new Error('Error generating Sample CSV template');
+    throw new Error('Error generating Sample CSV template', {
+      cause: e
+    });
   }
 }