typo

readme.md

@@ -36,7 +36,7 @@ curl localhost:8000/user
 ```
 Nutzer aktualisieren
 ```bash
-curl -X PUT -H "Content-Type: application/json"  -d ''{"mail":"max.mustermann@gmail.com","firstName":"Max","lastName":"Mustermann"}' localhost:8000/user/1
+curl -X PUT -H "Content-Type: application/json"  -d '{"mail":"max.mustermann@gmail.com","firstName":"Max","lastName":"Mustermann"}' localhost:8000/user/1
 ```
 Nutzer entfernen
 ```bash