[Bugfix] FA2 illegal memory access (vllm-project#12848)

Signed-off-by: SzymonOzog <[email protected]>

Author: LucasWilkinson

CMakeLists.txt

@@ -581,7 +581,7 @@ else()
   FetchContent_Declare(
           vllm-flash-attn
           GIT_REPOSITORY https://github.com/vllm-project/flash-attention.git
-          GIT_TAG d4e09037abf588af1ec47d0e966b237ee376876c
+          GIT_TAG 720c94869cf2e0ff5a706e9c7f1dce0939686ade
           GIT_PROGRESS TRUE
           # Don't share the vllm-flash-attn build between build types
           BINARY_DIR ${CMAKE_BINARY_DIR}/vllm-flash-attn