Update poison.rs to fix the typo (sys->sync)

SciMind2460 · web-flow · commit 639a3dc1c9ac · 2025-06-27T16:26:53.000+05:30
diff --git a/std/src/sync/poison.rs b/std/src/sync/poison.rs
@@ -13,7 +13,7 @@
 //! depend on the primitive. See [#Overview] bellow.
 //!
 //! For the alternative implementations that do not employ poisoning,
-//! see `std::sys::nonpoisoning`.
+//! see `std::sync::nonpoisoning`.
 //!
 //! # Overview
 //!
