Fix Windows test failures not being detected in CI (#36446)

Bug introduced in #35926 

Release Notes:

- N/A

crates/fs/src/fake_git_repo.rs

@@ -590,9 +590,9 @@ mod tests {
         assert_eq!(
             fs.files_with_contents(Path::new("")),
             [
-                (Path::new("/bar/baz").into(), b"qux".into()),
-                (Path::new("/foo/a").into(), b"lorem".into()),
-                (Path::new("/foo/b").into(), b"ipsum".into())
+                (Path::new(path!("/bar/baz")).into(), b"qux".into()),
+                (Path::new(path!("/foo/a")).into(), b"lorem".into()),
+                (Path::new(path!("/foo/b")).into(), b"ipsum".into())
             ]
         );
     }