Bump actions/checkout from 2 to 3 (#50)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/check.yml

@@ -28,7 +28,7 @@ jobs:
           python-version: "3.10"
       - name: install tox
         run: python -m pip install tox
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: setup python for test ${{ matrix.py }}
         uses: actions/setup-python@v2
         with:
@@ -60,7 +60,7 @@ jobs:
           - dev
           - pkg_check
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: setup Python 3.10
         uses: actions/setup-python@v2
         with:
@@ -83,7 +83,7 @@ jobs:
           python-version: "3.10"
       - name: install build
         run: python -m pip install build
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: build package
         run: python -m build --sdist --wheel . -o dist
       - name: publish to PyPI