Fix unexpected skipped deployment step

[ctmbl]

https://github.com/iScsc/blog.iscsc.fr/actions/runs/8949748241 has been skipped while it should not have been because https://github.com/iScsc/blog.iscsc.fr/pull/56/files contained a change in ./src and was a merge == a push to main

[ctmbl]

with workflow code:

          echo ${{ github.event.repository.fork }}
          echo ${{ github.event_name }}
          echo ''
          echo ${{ '1' == '1' }}
          echo ${{ ('1' == '1') }}
          echo ${{ ('1' == '1') || 'a' == 'b' }}
          echo ${{ ('1' == '1' && '2' == '2') }}
          echo ${{ ('1' == '1' && '2' == '2') || 'a' == 'b' }}
          echo ''
          echo ${{ github.event_name == 'pull_request' }}
          echo ${{ github.event.repository.fork == 'false' }}
          echo ${{ ! github.event.repository.fork }}
          echo ${{ (github.event_name == 'pull_request') }}
          echo ${{ (github.event_name == 'pull_request' && github.event.repository.fork == 'false') }}
          echo ${{ (github.event_name == 'pull_request') || github.event_name == 'workflow_dispatch' }}
          echo ${{ (github.event_name == 'pull_request' && github.event.repository.fork == 'false') || github.event_name == 'workflow_dispatch' }}

I got the output:

 false
pull_request

true
true
true
true
true

true
false
true
true
false
true
false

here: https://github.com/iScsc/blog.iscsc.fr/actions/runs/8954207026/job/24593567567

The important part is that:
${{ github.event.repository.fork }} evaluates to false
${{ github.event.repository.fork == 'false' }} evaluates to false despite the previous line!!!
${{ ! github.event.repository.fork }} evaluates to true which is expected!!