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/project_index.rs

@@ -3,7 +3,7 @@ use crate::{
     summary_index::FileSummary,
     worktree_index::{WorktreeIndex, WorktreeIndexHandle},
 };
-use anyhow::{anyhow, Context as _, Result};
+use anyhow::{Context as _, Result, anyhow};
 use collections::HashMap;
 use fs::Fs;
 use futures::FutureExt;