chore: bump shared workflows to v14 and use uv run in prek#3412

jeromekelleher merged 2 commits intotskit-dev:maintskit-dev/tskit:mainfrom

jeromekelleher:chore/shared-actions-v14-prek-uv-runjeromekelleher/tskit:chore/shared-actions-v14-prek-uv-runCopy head branch name to clipboard