[css-view-transitions-1] Fix UA styles indentation

Author: nt1m

css-view-transitions-1/Overview.bs

@@ -884,7 +884,7 @@ urlPrefix: https://wicg.github.io/navigation-api/; type: interface;
 	}
 
 	:root::view-transition-image-pair(*),
-        :root::view-transition-old(*),
+	:root::view-transition-old(*),
 	:root::view-transition-new(*) {
 		animation-duration: inherit;
 		animation-fill-mode: inherit;
@@ -893,7 +893,7 @@ urlPrefix: https://wicg.github.io/navigation-api/; type: interface;
 		animation-iteration-count: inherit;
 		animation-direction: inherit;
 		animation-play-state: inherit;
-        }
+	}
 
 	/* Default cross-fade transition */
 	@keyframes -ua-view-transition-fade-out {