CI: Add environment: release to push to PYPI

I didn't have trusted publishers configured properly
on the PyPI end, nor here I guess.
After this, I can rerun the CI job
manually

.github/workflows/CI.yml

@@ -123,6 +123,7 @@ jobs:
  # IMPORTANT: this permission is mandatory for trusted publishing
  # See https://docs.pypi.org/trusted-publishers/using-a-publisher/
  id-token: write
+ environment: release
  steps:
  - uses: actions/download-artifact@v3
  with:
@@ -144,8 +145,7 @@ jobs:
  contents: write
  defaults:
  run:
- working-directory:
- python
+ working-directory: python
  steps:
  - uses: actions/checkout@v3
  - uses: actions/setup-python@v4
@@ -173,8 +173,7 @@ jobs:
  runs-on: ubuntu-latest
  defaults:
  run:
- working-directory:
- python
+ working-directory: python
  steps:
  - uses: actions/checkout@v3
  - uses: actions/setup-python@v4