Bump actions/checkout from 6.0.3 to 7.0.0 in the github-actions group - #2

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/delete-package-versions@e5bc658cc4c965c472efe991f8beea3981499c55. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/