[css-values-4] Typo: missing parentheses

Author: Loirooriol

css-values-4/Overview.bs

@@ -2671,12 +2671,12 @@ Exponential  Functions: ''pow()'', ''sqrt()'', ''hypot()''</h3>
 
 		<pre class=lang-css>
 		:root {
-			--h6: calc(1rem * pow(1.5, -1);
-			--h5: calc(1rem * pow(1.5, 0);
-			--h4: calc(1rem * pow(1.5, 1);
-			--h3: calc(1rem * pow(1.5, 2);
-			--h2: calc(1rem * pow(1.5, 3);
-			--h1: calc(1rem * pow(1.5, 4);
+			--h6: calc(1rem * pow(1.5, -1));
+			--h5: calc(1rem * pow(1.5, 0));
+			--h4: calc(1rem * pow(1.5, 1));
+			--h3: calc(1rem * pow(1.5, 2));
+			--h2: calc(1rem * pow(1.5, 3));
+			--h1: calc(1rem * pow(1.5, 4));
 		}
 		</pre>