Bump actions/setup-python from 2 to 3

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] <[email protected]>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
       - name: Checkout
         uses: actions/[email protected]
       - name: Setup Python 3.9
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
         with:
           python-version: 3.9
         #----------------------------------------------
@@ -97,7 +97,7 @@ jobs:
       - name: Checkout
         uses: actions/[email protected]
       - name: Setup Python ${{ matrix.pyver }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
         with:
           python-version: ${{ matrix.pyver }}
         #----------------------------------------------
@@ -158,7 +158,7 @@ jobs:
       - name: Checkout
         uses: actions/[email protected]
       - name: Setup Python 3.9
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
         with:
           python-version: 3.9
       - name: Install Poetry