Github molecule-mongo and molecule-loadbalancer actions fail because of deprecated runners

[pmeulen]

Ubuntu 20.04 LTS was removed

This is a scheduled Ubuntu 20.04 retirement. Ubuntu 20.04 LTS runner will be removed on 2025-04-15. For more details, see actions/runner-images#11101

Update:

• OpenConext-deploy/.github/workflows/molecule-mongo.yml

  Line 18 in 74316df

  runs-on: ubuntu-20.04

• OpenConext-deploy/.github/workflows/molecule-loadbalancer.yml

  Line 24 in 74316df

  runs-on: ubuntu-20.04