* Run `bin/update_node 20.18.2 22.15.0`
* Remove expects on `fetchMock.callHistory.done()` to fix tests: are they necessary?
* Set node version to `22.x` in linked-url-proxy
* Increase test timeout to 30s in `github-sync`, Add waiting steps
* Define `navigator.onLine` in tests setup
GitOrigin-RevId: 75eb556e9f51b665e57497a0879b6915d14069ce