chore(deps): bump ex_doc from 0.40.3 to 0.40.4 in the dev group - #60

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: beam-community/actions-pr-title@v1.0.0. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/