u32 as char: suggested code is unchanged

[Zoybean]

Given the following code: playground link

pub fn u32_as_char(x: u32) -> char {
    (x as u32) as char
}

The current output is:

error[[E0604]](https://doc.rust-lang.org/stable/error-index.html#E0604): only `u8` can be cast as `char`, not `u32`
 --> src/lib.rs:3:5
  |
3 |     (x as u32) as char
  |     ^^^^^^^^^^^^^^^^^^ invalid cast
  |
help: try `char::from_u32` instead
 --> src/lib.rs:3:5
  |
3 |     (x as u32) as char
  |     ^^^^^^^^^^^^^^^^^^

For more information about this error, try `rustc --explain E0604`.

Ideally the output should look like:

error[[E0604]](https://doc.rust-lang.org/stable/error-index.html#E0604): only `u8` can be cast as `char`, not `u32`
 --> src/lib.rs:3:5
  |
3 |     (x as u32) as char
  |     ^^^^^^^^^^^^^^^^^^ invalid cast
  |
help: try `char::from_u32` instead
 --> src/lib.rs:3:5
  |
3 |     char::from_u32(x as u32)
  |     ^^^^^^^^^^^^^^^^^^^^^^^^

For more information about this error, try `rustc --explain E0604`.

@rustbot claim

Et Voila!

@Zoybean Here's the final result, pushing a PR soon 👋🏻

Should be fixed by #97169