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I updated the lock file example in PEP 751 after updating my PoC: https://peps.python.org/pep-0751/#example

The most exciting thing is the `[[packages.attestation-identities]]` table thanks to attrs (and so thanks to @hynek for using Trusted Publishers). Hopefully @yossarian and the other PEP 740 co-authors are happy with the outcome. 😊

And with that, PEP 751 is feature-complete! Going to give it until no later than March 17 to submit it for folks to find errors or things that need clarification.