This is a better fix. Docs for Azure/fetch-event-source mention you should re-throw the error in the onerror function to stop operation

Signed-off-by: Alex Lorenzi <alorenzi@spotify.com>

plugins/techdocs/src/client.ts

@@ -236,6 +236,7 @@ export class TechDocsStorageClient implements TechDocsStorageApi {
         onerror(err) {
           ctrl.abort();
           reject(err);
+          throw err; // rethrow to stop the operation
         },
       });
     });