Update requirements: Bump pymongo from 4.18.1 to 4.18.2 - #475

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: codecov/codecov-action@v4, DigiPie/mongo-action@v2.0.1. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/