Bump actions/setup-python from 2 to 3 (#19)

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 2 to 3.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v2...v3)

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

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/docs_pages.yaml

@@ -11,7 +11,7 @@ jobs:
     steps:
     - name: Checkout
       uses: actions/checkout@v3
-    - uses: actions/setup-python@v2
+    - uses: actions/setup-python@v3
       with:
         python-version: '3.8'
     - uses: abatilo/actions-poetry@v2.1.4

.github/workflows/release.yaml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-python@v2
+      - uses: actions/setup-python@v3
         with:
           python-version: '3.8'
       - uses: abatilo/actions-poetry@v2.1.4
@@ -41,7 +41,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-python@v2
+      - uses: actions/setup-python@v3
       - uses: abatilo/actions-poetry@v2.1.4
         with:
             poetry-version: 1.1.0