[libc++] Mark LWG4276 as complete (#208273)
We already harden std::array<T, 0>::front() and back(), and we have
tests for it.
Closes #171330
diff --git a/libcxx/docs/Status/Cxx26Issues.csv b/libcxx/docs/Status/Cxx26Issues.csv
index c74eff4..8441da1 100644
--- a/libcxx/docs/Status/Cxx26Issues.csv
+++ b/libcxx/docs/Status/Cxx26Issues.csv
@@ -170,7 +170,7 @@
"`LWG4272 <https://wg21.link/LWG4272>`__","For ``rank == 0``, ``layout_stride`` is atypically convertible","2025-11 (Kona)","","","`#171327 <https://github.com/llvm/llvm-project/issues/171327>`__",""
"`LWG4274 <https://wg21.link/LWG4274>`__","The ``chrono::hh_mm_ss`` constructor is ill-formed for unsigned durations","2025-11 (Kona)","","","`#171328 <https://github.com/llvm/llvm-project/issues/171328>`__",""
"`LWG4275 <https://wg21.link/LWG4275>`__","``std::dynamic_extent`` should also be defined in ``<mdspan>``","2025-11 (Kona)","|Complete|","21","`#171329 <https://github.com/llvm/llvm-project/issues/171329>`__",""
-"`LWG4276 <https://wg21.link/LWG4276>`__","``front()`` and ``back()`` are not hardened for zero-length ``std::array``\s","2025-11 (Kona)","","","`#171330 <https://github.com/llvm/llvm-project/issues/171330>`__",""
+"`LWG4276 <https://wg21.link/LWG4276>`__","``front()`` and ``back()`` are not hardened for zero-length ``std::array``\s","2025-11 (Kona)","|Complete|","17","`#171330 <https://github.com/llvm/llvm-project/issues/171330>`__",""
"`LWG4280 <https://wg21.link/LWG4280>`__","``simd::partial_load`` uses undefined identifier ``T``","2025-11 (Kona)","","","`#171331 <https://github.com/llvm/llvm-project/issues/171331>`__",""
"`LWG4286 <https://wg21.link/LWG4286>`__","Some more feature-test macros for fully freestanding features are not marked freestanding","2025-11 (Kona)","","","`#171332 <https://github.com/llvm/llvm-project/issues/171332>`__",""
"`LWG4291 <https://wg21.link/LWG4291>`__","``explicit map(const Allocator&)`` should be ``constexpr``","2025-11 (Kona)","","","`#171333 <https://github.com/llvm/llvm-project/issues/171333>`__",""
