Bump actions/checkout from 2 to 3

dependabot[bot] · Byron · commit 044a8bf5549d · 2022-05-29T11:09:45.000+08:00
Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 3. - [Release notes](https://github.com/actions/checkout/releases) - [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md) - [Commits](actions/checkout@v2...v3) --- updated-dependencies: - dependency-name: actions/checkout dependency-type: direct:production update-type: version-update:semver-major ... Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
@@ -21,7 +21,7 @@ jobs:
         python-version: [3.7, 3.7.5, 3.7.12, 3.8, 3.8.0, 3.8.11, 3.8, 3.9, 3.9.0, 3.9.7, "3.10"]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
       with:
         fetch-depth: 9999
     - name: Set up Python ${{ matrix.python-version }}
