Specify SDL version

Both vcpkg.json and the ever-in-progress Android version rely on specific versions of SDL, so we should specify the version in CMake too.

Author: tophyr

CMakeLists.txt

@@ -178,7 +178,7 @@ if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "GNU"
   add_compile_options("-Wno-multichar;-Wall")
 endif()
 
-find_package(SDL3 REQUIRED CONFIG REQUIRED COMPONENTS SDL3)
+find_package(SDL3 3.2.6 REQUIRED CONFIG REQUIRED COMPONENTS SDL3)
 find_package(glm REQUIRED)
 find_package(httplib QUIET)
 if (TARGET httplib::httplib)