chore(deps): update rust crate dashmap to v6

[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #209 will not alter performance

_{Comparing renovate/major-rust-crates (a40d9cb) with main (78136a6)}

Summary

✅ 2 untouched benchmarks

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 96.91%. Comparing base (a19fdab) to head (a40d9cb). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #209 +/- ## ======================================= Coverage 96.91% 96.91% ======================================= Files 11 11 Lines 2299 2299 ======================================= Hits 2228 2228 Misses 71 71 ```

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