Bump ruff from 0.15.13 to 0.15.15 - #416

Failed to save: Unable to reserve cache with key setup-uv-2-x86_64-unknown-linux-gnu-ubuntu-24.04-3.13.13-pruned-860281e046f56ed419bfc9a9ed6dc30041550551538e4b29a478c87e244d0edd, another job may be creating this cache.