Automated update to Github CI to rustc nightly-2024-12-21

Update Nightly Rustc Bot · Update Nightly Rustc Bot · commit bf82c040cb87 · 2024-12-23T01:53:46.000Z
diff --git a/nightly-version b/nightly-version
@@ -1 +1 @@
-nightly-2024-08-04
+nightly-2024-12-21
