docs: adds default values to useThrottleFn notation

adds default values into docs notation as they are not explicitly visible in docs web https://vueuse.org/shared/useThrottleFn/

packages/shared/useThrottleFn/index.ts

@@ -8,12 +8,13 @@ import { createFilterWrapper, throttleFilter } from '../utils'
  * @param   fn             A function to be executed after delay milliseconds. The `this` context and all arguments are passed through, as-is,
  *                                    to `callback` when the throttled-function is executed.
  * @param   ms             A zero-or-greater delay in milliseconds. For event callbacks, values around 100 or 250 (or even higher) are most useful.
+ *                                    (default value: 200)
  *
- * @param [trailing] if true, call fn again after the time is up
+ * @param [trailing] if true, call fn again after the time is up (default value: false)
  *
- * @param [leading] if true, call fn on the leading edge of the ms timeout
+ * @param [leading] if true, call fn on the leading edge of the ms timeout (default value: true)
  *
- * @param [rejectOnCancel] if true, reject the last call if it's been cancel
+ * @param [rejectOnCancel] if true, reject the last call if it's been cancel (default value: false)
  *
  * @return  A new, throttled, function.
  */