Update nighlty, fix warnings.

Fixes #2599

embassy-stm32-wpan/src/lib.rs

@@ -2,6 +2,7 @@
 #![allow(async_fn_in_trait)]
 #![doc = include_str!("../README.md")]
 // #![warn(missing_docs)]
+#![allow(static_mut_refs)] // TODO: Fix
 
 // This must go FIRST so that all the other modules see its macros.
 mod fmt;

embassy-stm32-wpan/src/mac/commands.rs

@@ -371,7 +371,7 @@ pub struct DataRequest {
 }
 
 impl DataRequest {
-    pub fn set_buffer<'a>(&'a mut self, buf: &'a [u8]) -> &mut Self {
+    pub fn set_buffer<'a>(&'a mut self, buf: &'a [u8]) -> &'a mut Self {
         self.msdu_ptr = buf as *const _ as *const u8;
         self.msdu_length = buf.len() as u8;