Bump actions/setup-python from 4 to 5

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 4 to 5.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v4...v5)

---
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>

.github/workflows/ci.yaml

@@ -73,7 +73,7 @@ jobs:
           submodules: true
 
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python }}
           cache: 'pip'
@@ -240,7 +240,7 @@ jobs:
           submodules: true
 
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ env.DEFAULT_PYTHON_VERSION }}
           cache: 'pip'
@@ -300,7 +300,7 @@ jobs:
         uses: frequenz-floss/setup-git-user@v2
 
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ env.DEFAULT_PYTHON_VERSION }}
           cache: 'pip'
@@ -342,7 +342,7 @@ jobs:
         uses: frequenz-floss/setup-git-user@v2
 
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ env.DEFAULT_PYTHON_VERSION }}
           cache: 'pip'