docs: Update dates.md with an actual inline fix for Liquid

[jeremenichelli]

Hi folks. While working with dates and dealing with UTC, I noticed that there was an easy inline fix in Liquid not mentioned in the documentation page. I think is quite simpler than having to build a whole filter pipeline.

This is extracted from LiquidJS official docs: https://liquidjs.com/filters/date.html

Let me know if you agree with me this is a valid extra bit of advice.

[Snapstromegon]

Thanks for contributing, just one suggestion.

[Snapstromegon]

Suggested change

	On Liquid, you can't do this, though you can create your own `toUTCString` [filter in Liquid](/docs/filters/) to perform the same task, or pass a timezone parameter to your filter to point to the one you desire in your template.
	On Liquid, you can't do this, though you can create your own `toUTCString` [filter in Liquid](/docs/languages/liquid/#filters) to perform the same task, or pass a timezone parameter to your filter to point to the one you desire in your template.

I think this specific link is closer to the link text.

[jeremenichelli]

Honestly, I just kept the original one from the team as I didn't touch that part specifically. Mostly edit it so it made sense to the follow up advice.