[libc++] Implement P2273R3 (`constexpr` `unique_ptr`)
Reviewed By: mordante, #libc
Differential Revision: https://reviews.llvm.org/D131315
NOKEYCHECK=True
GitOrigin-RevId: 30dadaa2eb499395f5bef44b9e1a18db6360ad1f
diff --git a/docs/ReleaseNotes.rst b/docs/ReleaseNotes.rst
index 5c15852..9831d03 100644
--- a/docs/ReleaseNotes.rst
+++ b/docs/ReleaseNotes.rst
@@ -40,6 +40,7 @@
- P2499R0 - ``string_view`` range constructor should be ``explicit``
- P2417R2 - A more constexpr bitset
- P2445R1 - ``std::forward_like``
+- P2273R3 - Making ``std::unique_ptr`` constexpr
Improvements and New Features
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