Invalid fix for PLE1141

- I think the autofix is not safe
- Ruff version: 0.6.4
- Ruff command: `ruff check --preview --fix`
```py
d: dict[tuple[int, str], bool] = {}
d[1, "a"] = True

for n, c in d:
    print(n, c)
```

autofixed to 

```py
d: dict[tuple[int, str], bool] = {}
d[1, "a"] = True

for n, c in d.items():
    print(n, c)
```