Adapt gix-path tests to changes in windows

Bumping the `windows` dev-dependency of `gix-path` from 0.58.0 to
0.61.1 broke the use of `windows::Win32::Foundation::BOOL`, since
`BOOL` is now `windows::core::BOOL` (and also available through
the `windows_core` crate).

It is not immediately obvious from the changelog at what point the
change occurred. (A seemingly related change is described for the
newer version microsoft/windows-rs#3441.
See microsoft/windows-rs#3441 for context.)

This imports `BOOL` from `windows::core` to adjust.

Author: EliahKagan

gix-path/src/env/git/tests.rs

@@ -7,8 +7,7 @@ mod locations {
     use std::path::{Path, PathBuf};
 
     use known_folders::{get_known_folder_path, KnownFolder};
-    use windows::core::Result as WindowsResult;
-    use windows::Win32::Foundation::BOOL;
+    use windows::core::{Result as WindowsResult, BOOL};
     use windows::Win32::System::Threading::{GetCurrentProcess, IsWow64Process};
     use winreg::enums::{HKEY_LOCAL_MACHINE, KEY_QUERY_VALUE};
     use winreg::RegKey;