#1622 Upgrade cached and scylla

[justinweng-instaclustr]

This PR upgrades cached from 0.50 to 0.51, and scylla from 0.12 to 0.13.

cargo upgrades don't show cached and scylla anymore.

Closes #1622

[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #1646 will not alter performance

_{Comparing justinweng-instaclustr:1622-update-scylla-and-cached-dependencies (ceddf29) with main (8c829c5)}

Summary

✅ 37 untouched benchmarks