fix(effects): update background image from PNG to GIF for improved animation

Author: bjohansebas

apps/site/styles/effects.css

@@ -13,7 +13,7 @@
     after:w-36
     after:-rotate-90
     after:select-none
-    after:bg-[url('/static/images/turtle.png')]
+    after:bg-[url('/static/images/turtle.gif')]
     after:opacity-[0.15]
     after:content-['']
     after:md:-left-1/2