Update npm in ci workflow

[SH-Exact]

This PR updates the github CI workflow so that node and implictly npm match the versions introduced in e6d8024 with volta support / pinned versions. In said commit the required npm version was increased to npm >= 11, but since the CI used node version 22.14.0 which bundles npm version 10.9.2 the github actions failed. Now the CI workflow uses node version 24.11.1 as pinned in package.json