Bump actions/setup-python from 2 to 2.2.2

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 2 to 2.2.2.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](https://github.com/actions/setup-python/compare/v2...v2.2.2)

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/build.yml

@@ -55,7 +55,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - run: rustup update
-      - uses: actions/setup-python@v2
+      - uses: actions/setup-python@v2.2.2
         with:
           python-version: 3.8
       - run: python -m venv python/venv
@@ -77,7 +77,7 @@ jobs:
         os: [ ubuntu-latest, macos-latest, windows-latest ]
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-python@v2
+      - uses: actions/setup-python@v2.2.2
         with:
           python-version: 3.6
       - run: pip install 'maturin>=0.9.2,<0.10'

.github/workflows/doc.yml

@@ -11,7 +11,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - run: rustup update
-      - uses: actions/setup-python@v2
+      - uses: actions/setup-python@v2.2.2
         with:
           python-version: 3.8
       - run: python -m venv python/venv

.github/workflows/release.yml

@@ -95,7 +95,7 @@ jobs:
         os: [ macos-latest, windows-latest ]
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-python@v2
+      - uses: actions/setup-python@v2.2.2
         with:
           python-version: 3.6
       - run: pip install 'maturin>=0.9.2,<0.10'
@@ -124,7 +124,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - run: rustup update
-      - uses: actions/setup-python@v2
+      - uses: actions/setup-python@v2.2.2
         with:
           python-version: 3.8
       - run: python -m venv python/venv