Update simde GIT_TAG to specific commit

Author: louwers

cmake_modules/simde.cmake

@@ -2,12 +2,12 @@ include(FetchContent)
 FetchContent_Declare(
         simde
         GIT_REPOSITORY https://github.com/simd-everywhere/simde.git
-        GIT_TAG master
+        GIT_TAG c6ddddc4a5bee9913b60de6757227aa078192663
 )
 FetchContent_MakeAvailable(simde)
 
 add_library(simde INTERFACE IMPORTED GLOBAL)
 target_include_directories(simde INTERFACE "${simde_SOURCE_DIR}")
 
 # Enables native aliases. Not ideal but makes it easier to convert old code.
-target_compile_definitions(simde INTERFACE SIMDE_ENABLE_NATIVE_ALIASES)
+target_compile_definitions(simde INTERFACE SIMDE_ENABLE_NATIVE_ALIASES)