[cmake] Fix httplib build with OpenSSL enabled but web service disabled (#3395)

Related to news changes, oops

Signed-off-by: crueter <crueter@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3395
Reviewed-by: Maufeat <sahyno1996@gmail.com>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: Lizzie <lizzie@eden-emu.dev>

externals/CMakeLists.txt

@@ -215,7 +215,7 @@ if (VulkanMemoryAllocator_ADDED)
 endif()
 
 # httplib
-if (ENABLE_WEB_SERVICE OR ENABLE_UPDATE_CHECKER)
+if (ENABLE_WEB_SERVICE OR ENABLE_UPDATE_CHECKER OR USE_DISCORD_PRESENCE OR ENABLE_OPENSSL)
     AddJsonPackage(httplib)
 endif()