Automated update to Github CI to rustc nightly-2025-09-06

Update Nightly Rustc Bot · Update Nightly Rustc Bot · commit 6b18b204edf7 · 2025-09-08T00:36:58.000Z
diff --git a/nightly-version b/nightly-version
@@ -1 +1 @@
-nightly-2025-08-30
+nightly-2025-09-06
