Fix logic when built docs are published to gh-pages

gh-1377 has made changes to condition of executing "Publish Docs"
step which resulted in that condition always evaluating to False,
and documentation changes were not uploaded for 8 months since the
merge of that PR.

Author: oleksandr-pavlyk

.github/workflows/generate-docs.yml

@@ -86,7 +86,7 @@ jobs:
           popd
           git reset --hard
       - name: Publish docs
-        if: ${{ github.event.pull_request && !github.event.pull_request.head.repo.fork && github.ref == 'refs/heads/master' && github.event.action != 'closed' }}
+        if: ${{ !github.event.pull_request && github.ref == 'refs/heads/master' }}
         shell: bash -l {0}
         run: |
           git remote add tokened_docs https://IntelPython:${{ secrets.GITHUB_TOKEN }}@github.com/IntelPython/dpctl.git