testbed: updated SDL3 version

testbed/CMakeLists.txt

@@ -7,7 +7,7 @@ include(FetchContent)
 FetchContent_Declare(
     SDL3
     GIT_REPOSITORY https://github.com/libsdl-org/SDL
-    GIT_TAG release-3.2.8
+    GIT_TAG release-3.2.10
     GIT_SHALLOW 1
 )