libretro: even more.. restart core to take affect message

Author: cscd98

Source/Core/DolphinLibretro/Boot.cpp

@@ -305,7 +305,7 @@ bool retro_load_game(const struct retro_game_info* game)
 
   if (!File::Exists(codehandler))
   {
-    OSD::AddMessage(fmt::format("Core file {} missing! Go to Online Updater ->\nCore System Files Downloader -> Install Dolphin.zip",
+    OSD::AddMessage(fmt::format("Core file {} missing! Go to Online Updater ->\nCore System Files Downloader -> Install Dolphin.zip. Restart core to take affect",
       GECKO_CODE_HANDLER), OSD::Duration::VERY_LONG, OSD::Color::RED);
     ERROR_LOG_FMT(BOOT, "Core file {} missing! Go to Online Updater -> Core System Files Downloader -> Install Dolphin.zip",
       GECKO_CODE_HANDLER);