chore: Fix Incorrect wrapping_add Usage in Integers Tutorial (#4295)

This pull request addresses an issue identified in the [integers
tutorial](https://noir-lang.org/docs/noir/syntax/data_types/integers/),
where the `wrapping_add` function was incorrectly called with a single
argument `(x + y)` instead of the correct form with two separate
arguments `(x, y)`.

### Changes Made
The documentation has been updated to reflect the correct usage:
```diff
- std::wrapping_add(x + y)
+ std::wrapping_add(x, y)
```

### Acknowledgements
Special thanks to @Complexlity for identifying this issue and bringing
it to attention through issue #4272.

docs/docs/noir/concepts/data_types/integers.md

@@ -157,6 +157,6 @@ Example of how it is used:
 use dep::std;
 
 fn main(x: u8, y: u8) -> pub u8 {
-    std::wrapping_add(x + y)
+    std::wrapping_add(x, y)
 }
 ```