perf: add truthProp util (#8522)

* perf: add TruthyProp util

* chore: rename

* chore: upd

src/action-bar/ActionBar.tsx

@@ -1,5 +1,5 @@
 import { defineComponent } from 'vue';
-import { createNamespace } from '../utils';
+import { truthProp, createNamespace } from '../utils';
 import { useChildren } from '@vant/use';
 
 const [name, bem] = createNamespace('action-bar');
@@ -10,10 +10,7 @@ export default defineComponent({
   name,
 
   props: {
-    safeAreaInsetBottom: {
-      type: Boolean,
-      default: true,
-    },
+    safeAreaInsetBottom: truthProp,
   },
 
   setup(props, { slots }) {