typo in guide (ru)

### What needs to be fixed?
typo (forgotten **&**):
```
// `into_iter()` для массивов выдаёт `i32`
```

### Page(s) Affected
https://doc.rust-lang.ru/stable/rust-by-example/fn/closures/closure_examples/iter_find.html

### Suggested Improvement
need change to:
```
// `into_iter()` для массивов выдаёт `&i32`
```

```[tasklist]
### Tasks
```
