Bump actions/setup-python from 2 to 4 (#1420)

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 2 to 4.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v2...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>

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

.github/workflows/ci-install-pkg.yml

@@ -13,7 +13,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@master
-      - uses: actions/setup-python@v2
+      - uses: actions/setup-python@v4
         with:
           python-version: 3.7
       - name: Create package
@@ -39,7 +39,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@master
-      - uses: actions/setup-python@v2
+      - uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
 

.github/workflows/ci-notebook.yml

@@ -17,7 +17,7 @@ jobs:
     steps:
     - uses: actions/checkout@v1
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
 

.github/workflows/ci-testing.yml

@@ -49,7 +49,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
 

.github/workflows/code-format.yml

@@ -12,7 +12,7 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v2
-      - uses: actions/setup-python@v2
+      - uses: actions/setup-python@v4
         with:
           python-version: 3.7
       - name: Install dependencies
@@ -27,7 +27,7 @@ jobs:
   #  runs-on: ubuntu-20.04
   #  steps:
   #    - uses: actions/checkout@master
-  #    - uses: actions/setup-python@v2
+  #    - uses: actions/setup-python@v4
   #      with:
   #        python-version: 3.8
   #    - name: Install mypy

.github/workflows/docs-check.yml

@@ -14,7 +14,7 @@ jobs:
     - uses: actions/checkout@master
       with:
         submodules: true
-    - uses: actions/setup-python@v2
+    - uses: actions/setup-python@v4
       with:
         python-version: 3.7
 
@@ -63,7 +63,7 @@ jobs:
       - uses: actions/checkout@master
         with:
           submodules: true
-      - uses: actions/setup-python@v2
+      - uses: actions/setup-python@v4
         with:
           python-version: 3.7
 

.github/workflows/pypi-release.yml

@@ -15,7 +15,7 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - uses: actions/setup-python@v2
+    - uses: actions/setup-python@v4
       with:
         python-version: 3.7