chore: bump nix flake rust nightly `fmt` overlay

update the rust nightly `fmt` overlay which needs to be pinned
to a specific version (this case by date)

update formatting in main files via `cargo fmt`

1 files changed, 1 insertions, 1 deletions

diff --git a/test_utils/src/relay.rs b/test_utils/src/relay.rs
index d767a5a..634b2d6 100644
--- a/test_utils/src/relay.rs
+++ b/test_utils/src/relay.rs
@@ -1,6 +1,6 @@
 use std::collections::HashMap;
 
-use anyhow::{bail, Result};
+use anyhow::{Result, bail};
 use nostr::{ClientMessage, JsonUtil, RelayMessage};
 
 use crate::CliTester;