`byref` parameters starting with some non-ASCII identifiers cannot be set.

`byref` parameters whose identifier starting with some non-ASCII (like Chinese characters) cannot be set.

**Repro steps**

Enter this code in fsi:

```fsharp
let f (x: int byref) = x <- x + 1
let f3 (a叉: int byref) = a叉 <- a叉 + 1
let f2 (叉: int byref) = 叉 <- 叉 + 1 // fails to compile
let f4 (叉a: int byref) = 叉a <- 叉a + 1 // fails to compile
```

**Expected behavior**

The code can be compiled successfully

**Actual behavior**

A `FS0027` was thrown.


**Known workarounds**

Don't use non-ASCII identifiers.

**Related information**

Provide any related information (optional):

* Windows 11 23H2
* .NET 9 with F#9
* Editing Tools: fsi or ionide-vscode