Add update image js to help-center-content repo action

[ricardoaerobr]

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[julia-rabello]

Hey, @ricardoaerobr!

Got this error when running locally:

I could give you some suggestions to fix this, but before going any further I think you should consider the following:

• Currently (on main) this script is indeed not called by index.js, but it is run by a GitHub action each time a PR is opened in this repository.
• Given that, it's not clear to me why it's necessary to make it run along with index.js. I think having it as a pull request action is enough and makes it easier to identify errors in image conversion. What are your thoughts on this? cc @PedroAntunesCosta

The key issue that needs to be fixed in the update-images script is image compression. The inability to compress large images seems to be the only error causing the action to fail on pull requests, so I would focus on solving that.