Automated update to Github CI to rustc nightly-2024-12-15

Update Nightly Rustc Bot · Update Nightly Rustc Bot · commit c16c6ec9e748 · 2024-12-16T02:05:18.000Z
diff --git a/nightly-version b/nightly-version
@@ -1 +1 @@
-nightly-2024-08-04
+nightly-2024-12-15
