chore(deps): bump virtualenv from 21.7.7 to 21.7.13 in the uv group across 1 directory - #134

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions-ecosystem/action-add-assignees@v1. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/