chore: remove redundant spaces in theme template css (vuejs#4337)

Author: chenjunyu19

template/.vitepress/theme/style.css

@@ -8,7 +8,7 @@
  *
  * Each colors have exact same color scale system with 3 levels of solid
  * colors with different brightness, and 1 soft color.
- * 
+ *
  * - `XXX-1`: The most solid color used mainly for colored text. It must
  *   satisfy the contrast ratio against when used on top of `XXX-soft`.
  *
@@ -43,7 +43,7 @@
  *   in custom container, badges, etc.
  * -------------------------------------------------------------------------- */
 
- :root {
+:root {
   --vp-c-default-1: var(--vp-c-gray-1);
   --vp-c-default-2: var(--vp-c-gray-2);
   --vp-c-default-3: var(--vp-c-gray-3);