Add AKF to machine learning collection

[HMAKT99]

Please confirm this pull request meets the following requirements:

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

Which change are you proposing?

• 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)
• Content (and my changes are in index.md)

Adds HMAKT99/AKF to the machine-learning collection. AKF is an open-source tool for embedding trust scores, source provenance, and compliance metadata into AI/ML outputs. Relevant to the ML collection as it addresses AI output transparency and EU AI Act compliance.

[kenyonj]

This is breaking the syntax of the front matter. Please fix.
Also, please restore the pull request template and fill it out.

[HMAKT99]

Fixed — the item was incorrectly on the same line as apache/hadoop. Now on its own line. Sorry about the broken syntax.

[HMAKT99]

Fixed both issues: YAML syntax corrected and PR template restored. Thanks for the review.