chore: update poetry in CI (#51)

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

.github/actions/setup-poetry/action.yml

@@ -8,7 +8,7 @@ runs:
   using: 'composite'
   steps:
     - name: Install poetry
-      run: pipx install poetry==1.8.3
+      run: pipx install poetry==1.8.4
       shell: bash
     - uses: actions/setup-python@v5
       id: py

.github/workflows/wheels.yml

@@ -64,7 +64,7 @@ jobs:
           python3 --version
           echo "pythonpath: ${{ steps.py.outputs.python-path }}"
           ${{ steps.py.outputs.python-path }} --version
-          pipx install poetry==1.8.3
+          pipx install poetry==1.8.4
           poetry env use ${{ steps.py.outputs.python-path }}
 
       - name: Set up custom PATH and set py version to cpXYZ [windows]