chore(deps): bump abatilo/actions-poetry from 2 to 4

Bumps [abatilo/actions-poetry](https://github.com/abatilo/actions-poetry) from 2 to 4.
- [Release notes](https://github.com/abatilo/actions-poetry/releases)
- [Changelog](https://github.com/abatilo/actions-poetry/blob/master/.releaserc)
- [Commits](abatilo/actions-poetry@v2...v4)

---
updated-dependencies:
- dependency-name: abatilo/actions-poetry
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/pythonapp.yml

@@ -22,7 +22,7 @@ jobs:
         with:
           python-version: "${{ matrix.python-version }}"
       - name: Install Poetry
-        uses: abatilo/actions-poetry@v2
+        uses: abatilo/actions-poetry@v4
       - name: Lint with pre-commit
         uses: pre-commit/[email protected]
       - name: Install dependencies