Bump actions/setup-python from 3 to 4

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 3 to 4.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](https://github.com/actions/setup-python/compare/v3...v4)

---
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.yml

@@ -26,7 +26,7 @@ jobs:
         run: pipx install pipenv
       -
         name: Set up Python
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: 3.9
           cache: "pipenv"
@@ -73,7 +73,7 @@ jobs:
         uses: actions/checkout@v3
       -
         name: Set up Python
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: "3.9"
       -
@@ -231,7 +231,7 @@ jobs:
         uses: actions/checkout@v3
       -
         name: Set up Python
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: 3.9
       -

.github/workflows/installer-library.yml

@@ -41,7 +41,7 @@ jobs:
         uses: actions/checkout@v3
       -
         name: Set up Python
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: "3.9"
       -

.github/workflows/reusable-ci-backend.yml

@@ -65,7 +65,7 @@ jobs:
         run: pipx install pipenv
       -
         name: Set up Python
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: "${{ matrix.python-version }}"
           cache: "pipenv"