Updated embassy and locked rust version

updater/src/lib.rs

@@ -1,6 +1,5 @@
 #![no_std]
 #![no_main]
-#![feature(type_alias_impl_trait)]
 #![feature(never_type)]
 
 use defmt::*;
@@ -22,7 +21,7 @@ use rust_mqtt::{
     packet::v5::publish_packet::QualityOfService,
 };
 use serde::Serialize;
-use static_cell::make_static;
+use static_cell::StaticCell;
 
 mod error;
 
@@ -63,7 +62,7 @@ where
 
     topic_status: &'static str,
     version: &'static str,
-    public_key: &'static [u8],
+    public_key: &'static [u8; 32],
 }
 
 impl<'a, DFU, STATE> Updater<'a, DFU, STATE>
@@ -77,7 +76,7 @@ where
         updater: BlockingFirmwareUpdater<'a, DFU, STATE>,
         topic_status: &'static str,
         version: &'static str,
-        public_key: &'static [u8],
+        public_key: &'static [u8; 32],
     ) -> Self {
         Self {
             updater,
@@ -92,7 +91,8 @@ where
         &self,
         config: &mut ClientConfig<'_, MAX_PROPERTIES, impl RngCore>,
     ) {
-        let msg = make_static!(Status::Disconnected.json());
+        static MSG: StaticCell<Vec<u8, 512>> = StaticCell::new();
+        let msg = MSG.init(Status::Disconnected.json());
         config.add_will(self.topic_status, msg, true);
     }