Fix missing std::sync::atomic::Ordering import for targets without atomic64 (#5808)

* Fix missing `std::sync::atomic::Ordering` import for targets without atomic64

* Add changelog for PR #5808

* Fix unused import: `sync::atomic::Ordering`

Author: rara64

newsfragments/5808.fixed.md

@@ -0,0 +1 @@
+Fix missing `std::sync::atomic::Ordering` import for targets without atomic64.

src/impl_/pymodule.rs

@@ -7,6 +7,13 @@ use std::{
     os::raw::{c_int, c_void},
 };
 
+#[cfg(all(
+    not(any(PyPy, GraalPy)),
+    Py_3_9,
+    not(all(windows, Py_LIMITED_API, not(Py_3_10))),
+))]
+use std::sync::atomic::Ordering;
+
 #[cfg(all(
     not(any(PyPy, GraalPy)),
     Py_3_9,
@@ -20,7 +27,7 @@ use portable_atomic::AtomicI64;
     not(all(windows, Py_LIMITED_API, not(Py_3_10))),
     target_has_atomic = "64",
 ))]
-use std::sync::atomic::{AtomicI64, Ordering};
+use std::sync::atomic::AtomicI64;
 
 #[cfg(not(any(PyPy, GraalPy)))]
 use crate::exceptions::PyImportError;