fixes to d2 - #94

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v2, mamba-org/setup-micromamba@v1. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Unexpected input(s) 'activate-environment', valid inputs are ['condarc-file', 'condarc', 'environment-file', 'environment-name', 'create-args', 'log-level', 'micromamba-version', 'micromamba-url', 'download-micromamba', 'init-shell', 'generate-run-shell', 'cache-downloads', 'cache-downloads-key', 'cache-environment', 'cache-environment-key', 'post-cleanup', 'micromamba-root-path', 'micromamba-binary-path']