Edit CI workflow to authenticate to Pypi via API token

.github/workflows/workflow.yml

@@ -184,8 +184,8 @@ jobs:
     needs: [ check-for-functional-changes ]
     if: needs.check-for-functional-changes.outputs.status == 'success'
     env:
-      PYPI_USERNAME: openfisca-bot
-      PYPI_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
+      PYPI_USERNAME: __token__
+      PYPI_TOKEN: ${{ secrets.PYPI_TOKEN_OPENFISCA_BOT }}
       CIRCLE_TOKEN: ${{ secrets.CIRCLECI_V1_OPENFISCADOC_TOKEN }} # Personal API token created in CircleCI to grant full read and write permissions
 
     steps:
@@ -213,7 +213,7 @@ jobs:
           key: release-${{ env.pythonLocation }}-${{ hashFiles('setup.py') }}-${{ github.sha }}
 
       - name: Upload a Python package to PyPi
-        run: twine upload dist/* --username $PYPI_USERNAME --password $PYPI_PASSWORD
+        run: twine upload dist/* --username $PYPI_USERNAME --password $PYPI_TOKEN
 
       - name: Publish a git tag
         run: "${GITHUB_WORKSPACE}/.github/publish-git-tag.sh"