cleanup: trim trailing whitespace (#11136)

* cleanup: trim trailing whitespace

* update(`.editorconfig`)

---------

Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>

packages/backend/src/server/api/SigninService.ts

@@ -36,7 +36,7 @@ export class SigninService {
 				headers: request.headers as any,
 				success: true,
 			}).then(x => this.signinsRepository.findOneByOrFail(x.identifiers[0]));
-	
+
 			// Publish signin event
 			this.globalEventService.publishMainStream(user.id, 'signin', await this.signinEntityService.pack(record));
 		});