chore: update demo

iamkun · iamkun · commit 45f88334d08f · 2025-03-20T12:21:15.000+08:00
diff --git a/docs/demo/index.js b/docs/demo/index.js
@@ -31,3 +31,6 @@ dayjs().isSame(dayjs())
 
 // isLeapYear
 dayjs().isLeapYear()
+
+// isBetween
+dayjs().isBetween(dayjs().subtract(1, 'year'), dayjs().add(1, 'year'))
