unpin miri (bevyengine#6863)

hymm · ItsDoot · commit 00deb2318ec8 · 2023-01-31T20:00:12.000-06:00
# Objective - rust-lang/miri#2713 was merged into miri. See if this fixes miri for bevy.
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
@@ -9,7 +9,7 @@ on:
 
 env:
   CARGO_TERM_COLOR: always
-  NIGHTLY_TOOLCHAIN: nightly-2022-11-28
+  NIGHTLY_TOOLCHAIN: nightly
 
 jobs:
   build:
