Changed install command for pipx

from
  python3 -m pip install --user --upgrade pipx
to
  apt update && apt install -y pipx && pipx install poetry

Author: ckunki

.github/actions/python-environment/action.yml

@@ -35,7 +35,7 @@ runs:
     - name: Set up pipx if not present
       shell: bash
       run: |
-        python3 -m pip install --user --upgrade pipx
+        apt update && apt install -y pipx && pipx install poetry
         python3 -m pipx ensurepath
         echo "$HOME/.local/bin" >> $GITHUB_PATH