Update WDIO

[garethbowen]

Describe the issue
We a long way behind on our WDIO dependency and missing out on lots of good changes upstream.

Describe the improvement you'd like
Upgrade.

When I tried the naive approach many suites started failing on cookies and similar, eg:

[chrome 116.0.5845.187 linux #0-6] 1) Log in should set correct cookies
[chrome 116.0.5845.187 linux #0-6] expected { domain: 'localhost', …(7) } to have property 'session'      
      actual expected
      
      { domain: 'localhost', expiry: 1726682707, httpOnly: true, name: 'AuthSession', path: '/', sameSite: 'Lax', secure: false, value: 'YWRtaW46NjUwOUUyRDM6BUJiGEF8nHS-L_zMjUQtihQYoj2evftkgLr5bDPoctQ' }undefined
      
[chrome 116.0.5845.187 linux #0-6] AssertionError: expected { domain: 'localhost', …(7) } to have property 'session'
[chrome 116.0.5845.187 linux #0-6]     at Context.<anonymous> (/home/runner/work/cht-core/cht-core/tests/e2e/default/login/login-logout.wdio-spec.js:87:36)
[chrome 116.0.5845.187 linux #0-6]     at runMicrotasks (<anonymous>)
[chrome 116.0.5845.187 linux #0-6]     at processTicksAndRejections (node:internal/process/task_queues:96:5)

https://github.com/medic/cht-core/actions/runs/6231412091/job/16936676603