Silence RUSTSEC-2023-0086

[emilk]

What

• Waiting for a proper fix in Update lexical-core requirement from ^0.8 to ^1.0 apache/arrow-rs#6401
• Should be fixed before Tracking issue: Migrate from re_arrow2 to arrow #3741 is considered finished

Checklist

• I have read and agree to Contributor Guide and the Code of Conduct
• I've included a screenshot or gif (if applicable)
• I have tested the web demo (if applicable):
  • Using examples from latest main build: rerun.io/viewer
  • Using full set of examples from nightly build: rerun.io/viewer
• The PR title and labels are set such as to maximize their usefulness for the next release's CHANGELOG
• If applicable, add a new check to the release checklist!
• If have noted any breaking changes to the log API in CHANGELOG.md and the migration guide

• PR Build Summary
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