Update t8code_jll requirement from =4.0.6 to =4.0.6, 4.0 in the all-julia-dependencies group across 1 directory - #130

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