[FA/Chore] Bump FA version for FP8 two-level accumulation (#27889)

Signed-off-by: Jonas Kuebler <kuebj@amazon.com>
Co-authored-by: Lucas Wilkinson <LucasWilkinson@users.noreply.github.com>

cmake/external_projects/vllm_flash_attn.cmake

@@ -38,7 +38,7 @@ else()
   FetchContent_Declare(
           vllm-flash-attn
           GIT_REPOSITORY https://github.com/vllm-project/flash-attention.git
-          GIT_TAG a893712401d70362fbb299cd9c4b3476e8e9ed54
+          GIT_TAG 8e1b01d56210dc72030a2d0d41c2d8d266ba6309
           GIT_PROGRESS TRUE
           # Don't share the vllm-flash-attn build between build types
           BINARY_DIR ${CMAKE_BINARY_DIR}/vllm-flash-attn