Too many link checker reports

[lyashevska]

Each time someone pushes to main (should not be possible!) there is an issue created by the link checker. Same for the PR. Consider removing:

  push:
    branches:
    - main
  pull_request:
    branches:
    - main 

from https://github.com/NLeSC/python-template/blob/main/.github/workflows/link-check.yml

[fdiblen]

I disabled the GitHub Action as it is creating too much noise at the moment.