Update index.md with TargetJS

[wasfi2]

Please confirm this pull request meets the following requirements:

• [ x ] I followed the contributing guidelines: https://github.com/github/explore/blob/main/CONTRIBUTING.md.
• [ x ] This change is not self-promotion.

Which change are you proposing?

• [ x ] Suggesting edits to an existing topic or collection
• Curating a new topic or collection
• Something that does not neatly fit into the binary options above

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Editing an existing topic or collection

I'm suggesting these edits to an existing topic or collection:

• Image (and my file is *.png, square, dimensions 288x288, size <= 75 kB)
• [ x ] Content (and my changes are in index.md)

Please replace this line with an explanation of why you think these changes should be made.

Curating a new topic or collection

• [ x ] I've formatted my changes as a new folder directory, named for the topic or collection as it appears in the URL on GitHub (e.g. https://github.com/topics/[NAME] or https://github.com/collections/[NAME])
• My folder contains a *.png image (if applicable) and index.md
• All required fields in my index.md conform to the Style Guide and API docs: https://github.com/github/explore/tree/main/docs

Please replace this line with an explanation of why you think this topic or collection should be curated.

Something that does not neatly fit into the binary options above

• [ x ] My suggested edits are not about an existing topic or collection, or at least not a single one
• My suggested edits are not about curating a new topic or collection, or at least not a single one
• My suggested edits conform to the Style Guide and API docs: https://github.com/github/explore/tree/main/docs

I’m adding TargetJS to this collection. TargetJS introduces a novel approach to front-end development especially around async operations with compact format almost REBOL style.

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Please note: we will close your PR without comment if you do not check the boxes above and provide ALL requested information.

[jmeridth]

🛑 Thank you for the contribution ❤️. Unfortunately, as per our contribution guidelines, we don't allow self promotion:

Avoid conflicts of interest. These should be of general community interest, not self promotions. If it is self promotion, it’s unlikely to be accepted.

We do this so that project get curated if there is enough support/activity in the community. Thank you!