chore: Bump Rust edition to 2024 (#27800)

Follow-up to https://github.com/zed-industries/zed/pull/27791

Release Notes:

- N/A

crates/semantic_index/src/embedding/open_ai.rs

@@ -1,6 +1,6 @@
 use crate::{Embedding, EmbeddingProvider, TextToEmbed};
 use anyhow::Result;
-use futures::{future::BoxFuture, FutureExt};
+use futures::{FutureExt, future::BoxFuture};
 use http_client::HttpClient;
 pub use open_ai::OpenAiEmbeddingModel;
 use std::sync::Arc;