Move to LLVM 22 release notes

Author: ldionne

libcxx/docs/ReleaseNotes/21.rst

@@ -96,10 +96,6 @@ Improvements and New Features
   production but should not be used outside of this scenario. Please refer to the :ref:`Hardening documentation
   <hardening>` for details.
 
-- The ``std::distance`` and ``std::ranges::distance`` algorithms have been optimized for segmented iterators (e.g.,
-  ``std::join_view`` iterators), reducing the complexity from ``O(n)`` to ``O(n / segment_size)``. Benchmarks show
-  performance improvements of over 1600x in favorable cases with large segment sizes (e.g., 1024).
-
 Deprecations and Removals
 -------------------------
 

libcxx/docs/ReleaseNotes/22.rst

@@ -43,6 +43,10 @@ Implemented Papers
 Improvements and New Features
 -----------------------------
 
+- The ``std::distance`` and ``std::ranges::distance`` algorithms have been optimized for segmented iterators (e.g.,
+  ``std::join_view`` iterators), reducing the complexity from ``O(n)`` to ``O(n / segment_size)``. Benchmarks show
+  performance improvements of over 1600x in favorable cases with large segment sizes (e.g., 1024).
+
 Deprecations and Removals
 -------------------------