windows: Fix tests on Windows (#22616)

Release Notes:

- N/A

---------

Co-authored-by: Mikayla <mikayla.c.maki@gmail.com>

crates/editor/src/display_map.rs

@@ -1433,7 +1433,10 @@ impl ToDisplayPoint for Anchor {
 #[cfg(test)]
 pub mod tests {
     use super::*;
-    use crate::{movement, test::marked_display_snapshot};
+    use crate::{
+        movement,
+        test::{marked_display_snapshot, test_font},
+    };
     use block_map::BlockPlacement;
     use gpui::{
         div, font, observe, px, App, AppContext as _, BorrowAppContext, Element, Hsla, Rgba,
@@ -1492,10 +1495,11 @@ pub mod tests {
             }
         });
 
+        let font = test_font();
         let map = cx.new(|cx| {
             DisplayMap::new(
                 buffer.clone(),
-                font("Helvetica"),
+                font,
                 font_size,
                 wrap_width,
                 true,