Update tests/pass/zero-sized-accesses-and-offsets.rs

Co-authored-by: Ralf Jung <[email protected]>

Author: oli-obk

tests/pass/zero-sized-accesses-and-offsets.rs

@@ -1,7 +1,7 @@
 //! Tests specific for <https://github.com/rust-lang/rust/issues/117945>: zero-sized operations.
 #![feature(strict_provenance)]
 
-//@only-miri: FIXME: copy_nonoverlapping assertion triggered
+//@only-miri: FIXME: copy_nonoverlapping assertion triggered (https://github.com/rust-lang/rust/issues/131371)
 
 use std::ptr;