Fix sample app toml
@@ -17,7 +17,7 @@ authors = ["Yew App Developer <name@example.com>"]
edition = "2018"
[dependencies]
-yew = { version = "0.13.0", features = "std_web" }
+yew = { version = "0.13.0", features = ["std_web"] }
```
{% endcode %}
