chore(deps): bump github.com/posthog/posthog-go from 1.12.5 to 1.33.0 - #733

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: golangci/golangci-lint-action@v8.0.0. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/