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/rust.rs

@@ -74,7 +74,7 @@ impl LspAdapter for RustLspAdapter {
             let decompressed_bytes = GzipDecoder::new(BufReader::new(response.body_mut()));
             let mut file = File::create(&destination_path).await?;
             futures::io::copy(decompressed_bytes, &mut file).await?;
-            // todo!("windows")
+            // todo("windows")
             #[cfg(not(windows))]
             {
                 fs::set_permissions(