[unsupervised AI] Pin nightly Bokeh builds to Node 24 - #9361

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: andymckay/labeler@1.0.4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/