Automated update to Github CI to rustc nightly-2025-09-19

Update Nightly Rustc Bot · Update Nightly Rustc Bot · commit c05ecac2a9a0 · 2025-09-20T01:52:42.000Z
diff --git a/nightly-version b/nightly-version
@@ -1 +1 @@
-nightly-2025-09-12
+nightly-2025-09-19
