Use project Python to install Poetry

By default, pipx uses the runner's system Python installation to install Poetry. Although this works, it is best to use
the controlled Python installation (installed via the `actions/setup-python` step) for all project operations.

Author: per1234

action.yml

@@ -65,6 +65,7 @@ runs:
       shell: bash
       run: |
         pipx install \
+          --python "$(which python)" \
           poetry==1.4.0
 
     - name: Install Python Dependencies