cargo audit workflow has been failing to run since 2023-12

[cburroughs]

Last pass: https://github.com/pantsbuild/pants/actions/runs/7245331989
First Fail: https://github.com/pantsbuild/pants/actions/runs/7259097274/job/19775586246

On a recent run, the log ends with:

Compiling cargo-audit v0.17.5
    Finished `release` profile [optimized] target(s) in 1m 33s
   Replacing /home/runner/.cargo/bin/cargo-audit
    Replaced package `cargo-audit v0.21.0` with `cargo-audit v0.17.5` (executable `cargo-audit`)
pants: Failed to find a Python 3.11 interpreter
    Fetching advisory database from `[https://github.com/RustSec/advisory-db.git`](https://github.com/RustSec/advisory-db.git%60)
      Loaded 724 security advisories (from /home/runner/.cargo/advisory-db)
    Updating crates.io index
error: not found: Couldn't load Cargo.lock: I/O operation failed: parse error: parse error: invalid Cargo.lock format version: `4`

Possibly identical to #19844