Bump actions/setup-python from 2 to 3.0.0

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 2 to 3.0.0.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v2...v3.0.0)

---
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/docs.yml

@@ -29,7 +29,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v3.0.0
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies

.github/workflows/int.yml

@@ -23,7 +23,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v3.0.0
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install requirements

.github/workflows/style.yml

@@ -15,7 +15,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v3.0.0
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies

.github/workflows/unit.yml

@@ -15,7 +15,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v3.0.0
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install libcurl-devel