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/languages/src/csharp.rs

@@ -81,7 +81,7 @@ impl super::LspAdapter for OmniSharpAdapter {
             archive.unpack(container_dir).await?;
         }
 
-        // todo!("windows")
+        // todo("windows")
         #[cfg(not(windows))]
         {
             fs::set_permissions(