convert font surface to fix pygame2 error

.gitignore

@@ -4,3 +4,4 @@ MANIFEST
 dist/
 build/
 *.mp4
+venv/

NS.py

@@ -1896,7 +1896,7 @@ class Ending(Animation):
         self.play(self.start, delay=3000, play_once=True)
         font = Font(self.get_resource("rounded-mplus-1m-bold.ttf"), 64)
         time = self.get_game().title.get_formatted_time(self.get_game().most_recent_time)
-        foreground = font.render(time, False, (180, 150, 20))
+        foreground = font.render(time, False, (180, 150, 20)).convert_alpha()
         dsr = self.get_display_surface().get_rect()
         self.text = RainbowSprite(self, foreground, 180, 200)
         self.text.location.midtop = dsr.centerx, 80