Remove ! from todo!() in comments (#8643)

This practice makes it difficult to locate todo!s in my code when I'm
working. Let's take out the bang if we want to keep doing this.

Release Notes:

- N/A

crates/gpui/src/platform/blade/blade_renderer.rs

@@ -564,7 +564,7 @@ impl BladeRenderer {
                     }
                     PrimitiveBatch::Paths(paths) => {
                         let mut encoder = pass.with(&self.pipelines.paths);
-                        //todo!(linux): group by texture ID
+                        // todo(linux): group by texture ID
                         for path in paths {
                             let tile = &self.path_tiles[&path.id];
                             let tex_info = self.atlas.get_texture_info(tile.texture_id);