Prepare for merging from rust-lang/rust

The rustc-josh-sync Cronjob Bot · The rustc-josh-sync Cronjob Bot · commit 94a62dc6045f · 2025-12-02T10:59:26.000Z
This updates the rust-version file to 47cd712.
diff --git a/library/compiler-builtins/rust-version b/library/compiler-builtins/rust-version
@@ -1 +1 @@
-caccb4d0368bd918ef6668af8e13834d07040417
+47cd7120d9b4e1b64eb27c87522a07888197fae8
