Fix CI compiletest breakage due to Rust 1.63

Author: Dirbaio

cortex-m-rt/tests/compile-fail/non-static-resource.rs

@@ -21,15 +21,15 @@ fn SVCall() {
     static mut STAT: u8 = 0;
 
     let _stat: &'static mut u8 = STAT;
-    //~^ ERROR lifetime of reference outlives lifetime of borrowed content
+    //~^ ERROR lifetime may not live long enough
 }
 
 #[interrupt]
 fn UART0() {
     static mut STAT: u8 = 0;
 
     let _stat: &'static mut u8 = STAT;
-    //~^ ERROR lifetime of reference outlives lifetime of borrowed content
+    //~^ ERROR lifetime may not live long enough
 }
 
 #[entry]