Automated update to Github CI to rustc nightly-2025-06-08

Update Nightly Rustc Bot · Update Nightly Rustc Bot · commit 1db09e4c7b77 · 2025-06-09T02:22:56.000Z
diff --git a/nightly-version b/nightly-version
@@ -1 +1 @@
-nightly-2024-08-04
+nightly-2025-06-08
