fix(theme): make features section layout consistent (#2382)

Co-authored-by: Divyansh Singh <40380293+brc-dd@users.noreply.github.com>

src/client/theme-default/components/VPFeatures.vue

@@ -26,7 +26,7 @@ const grid = computed(() => {
     return 'grid-3'
   } else if (length % 3 === 0) {
     return 'grid-6'
-  } else if (length % 2 === 0) {
+  } else if (length > 3) {
     return 'grid-4'
   }
 })