chore: Bump Rust edition to 2024 (#27800)

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

Release Notes:

- N/A

crates/collab/src/llm/db/tests/usage_tests.rs

@@ -1,11 +1,12 @@
 use crate::llm::FREE_TIER_MONTHLY_SPENDING_LIMIT;
 use crate::{
+    Cents,
     db::UserId,
     llm::db::{
-        queries::{providers::ModelParams, usages::Usage},
         LlmDatabase, TokenUsage,
+        queries::{providers::ModelParams, usages::Usage},
     },
-    test_llm_db, Cents,
+    test_llm_db,
 };
 use chrono::{DateTime, Duration, Utc};
 use pretty_assertions::assert_eq;