fix lint err

packages/slackbot-proxy/src/controllers/privacy.ts

@@ -14,7 +14,7 @@ export class PrivacyCtrl {
 
   // eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
   getPrivacy(req: Request, res: Response): string|void {
-    res.render("privacy.ejs");
+    res.render('privacy.ejs');
   }
 
 }