fix(review.vue): replace >>> deep selector with ::v-deep for postcss compat

cfc-frontend/pages/tasks/review.vue

@@ -313,7 +313,7 @@ export default {
 }
 
 /* Deep selector to style PlayfulButton inside actions slot */
-.card-actions >>> .playful-btn {
+.card-actions ::v-deep .playful-btn {
   flex: 1;
 }
 </style>