Make gap consistent

Author: adamwoodnz

projects/js-packages/charts/src/components/pie-chart/pie-chart.module.scss

@@ -3,5 +3,5 @@
 	flex-direction: column;
 	overflow: hidden;
 	align-items: center;
-	gap: var(--wp-ui-stack-gap, 20px);
+	gap: 20px;
 }

projects/js-packages/charts/src/components/pie-semi-circle-chart/pie-semi-circle-chart.module.scss

@@ -2,7 +2,7 @@
 	display: flex;
 	flex-direction: column;
 	text-align: center;
-
+	gap: 20px;
 
 	.label {
 		margin-bottom: 0; // Add space between label and pie chart