Update multi_bounds.md

Author: sumade123

src/generics/multi_bounds.md

@@ -1,6 +1,6 @@
 # Multiple bounds
 
-Multiple bounds can be applied with a `+`. Like normal, different types are
+Multiple bounds for a single type can be applied with a `+`. Like normal, different types are
 separated with `,`.
 
 ```rust,editable