Automated update to Github CI to rustc nightly-2024-08-18

Update Nightly Rustc Bot · Update Nightly Rustc Bot · commit 20ecf5e5d8bd · 2024-08-19T01:37:04.000Z
diff --git a/nightly-version b/nightly-version
@@ -1 +1 @@
-nightly-2024-08-14
+nightly-2024-08-18
