Update CHANGELOG.md

Author: hwu36

CHANGELOG.md

@@ -42,6 +42,8 @@
   - Performance search under a fixed GEMM shape: Enables exhaustive tuning within a fixed GEMM shape, exploring various kernel parameters to find the best configuration.
   - More detailed introductions and examples to leverage this feature can be found in [profiler.md](./media/docs/cpp/profiler.md#exhaustive-search-mode-and-top-k-output-ranking-according-to-performance-in-gflopss).
 * Support `void` as the D element in sm100 kernel epilogues.
+* Various improvements and fixes from the community and CUTLASS team. Thanks to everyone who submitted PRs!
+* Optimal code generation with CUDA toolkit versions 12.8U1.
 
 ## [3.8.0](https://github.com/NVIDIA/cutlass/releases/tag/v3.8.0) (2025-01-25)