fix(infinitescroll): added method to reset _highestY

### Release Notes

<details>
<summary>ionic-team/stencil (@&#8203;stencil/core)</summary>

###
[`v4.19.0`](https://togithub.com/ionic-team/stencil/blob/HEAD/CHANGELOG.md#-4190-2024-06-26)

[Compare
Source](https://togithub.com/ionic-team/stencil/compare/v4.18.3...v4.19.0)

### Bug Fixes

* **compiler:** support rollup's external input option
([#3227](stenciljs/core#3227))
([2c68849](stenciljs/core@2c68849)),
fixes [#3226](stenciljs/core#3226)
* **emit:** don't emit test files
([#5789](stenciljs/core#5789))
([50892f1](stenciljs/core@50892f1)),
fixes [#5788](stenciljs/core#5788)
* **hyrdate:** support vdom annotation in nested dsd structures
([#5856](stenciljs/core#5856))
([61bb5e3](stenciljs/core@61bb5e3))
* label attribute not toggling input
([#3474](stenciljs/core#3474))
([13db920](stenciljs/core@13db920)),
fixes [#3473](stenciljs/core#3473)
* **mock-doc:** expose ShadowRoot and DocumentFragment globals
([#5827](stenciljs/core#5827))
([98bbd7c](stenciljs/core@98bbd7c)),
fixes [#3260](stenciljs/core#3260)
* **runtime:** allow watchers to fire w/ no Stencil members
([#5855](stenciljs/core#5855))
([850ad4f](stenciljs/core@850ad4f)),
fixes [#5854](stenciljs/core#5854)
* **runtime:** catch errors in async lifecycle methods
([#5826](stenciljs/core#5826))
([87e5b33](stenciljs/core@87e5b33)),
fixes [#5824](stenciljs/core#5824)
* **runtime:** don't register listener before connected to DOM
([#5844](stenciljs/core#5844))
([9d7021f](stenciljs/core@9d7021f)),
fixes [#4067](stenciljs/core#4067)
* **runtime:** properly assign style declarations
([#5838](stenciljs/core#5838))
([5c10ebf](stenciljs/core@5c10ebf))
* **testing:** allow to re-use pages across it blocks
([#5830](stenciljs/core#5830))
([561eab4](stenciljs/core@561eab4)),
fixes [#3720](stenciljs/core#3720)
* **typescript:** remove unsupported label property
([#5840](stenciljs/core#5840))
([d26ea2b](stenciljs/core@d26ea2b)),
fixes [#3473](stenciljs/core#3473)


### Features

* **cli:** support generation of sass and less files
([#5857](stenciljs/core#5857))
([1883812](stenciljs/core@1883812)),
closes [#2155](stenciljs/core#2155)
* **compiler:** generate export maps on build
([#5809](stenciljs/core#5809))
([b6d2404](stenciljs/core@b6d2404))
* **complier:** support type import aliasing
([#5836](stenciljs/core#5836))
([7ffb25d](stenciljs/core@7ffb25d)),
closes [#2335](stenciljs/core#2335)
* **runtime:** support declarative shadow DOM
([#5792](stenciljs/core#5792))
([c837063](stenciljs/core@c837063)),
closes [#4010](stenciljs/core#4010)
* **testing:** add `toHaveLastReceivedEventDetail` event spy matcher
([#5829](stenciljs/core#5829))
([63491de](stenciljs/core@63491de)),
closes [#2488](stenciljs/core#2488)
* **testing:** allow to disable network error logging via
'logFailingNetworkRequests' option
([#5839](stenciljs/core#5839))
([dac3e33](stenciljs/core@dac3e33)),
closes [#2572](stenciljs/core#2572)
* **testing:** expose captureBeyondViewport in pageCompareScreenshot
([#5828](stenciljs/core#5828))
([cf6a450](stenciljs/core@cf6a450)),
closes [#3188](stenciljs/core#3188)

</details>