Patched Diamond spinner glitch on iOS

On iOS browsers (e.g. Chrome and Safari), the animation from left: 0 -> left: 50% does not get handled correctly. Adding the percent sign fixes this.

Author: EthanBehrends

src/Diamonds.svelte

@@ -17,7 +17,7 @@
  width: calc(var(--size) / 4);
  height: calc(var(--size) / 4);
  position: absolute;
- left: 0;
+ left: 0%;
  top: 0;
  border-radius: 2px;
  background: var(--color);