Automated update to Github CI to rustc nightly-2025-08-31

Update Nightly Rustc Bot · Update Nightly Rustc Bot · commit 97bf4d7db2a6 · 2025-09-01T02:23:57.000Z
diff --git a/nightly-version b/nightly-version
@@ -1 +1 @@
-nightly-2024-08-04
+nightly-2025-08-31
