Bump actions/checkout from 2 to 3 (#689)

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] <[email protected]>

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
         python-version: ["3.7", "3.8", "3.9", "3.10"]
 
     steps:
-      - uses: "actions/checkout@v2"
+      - uses: "actions/checkout@v3"
       - uses: "actions/setup-python@v2"
         with:
           python-version: ${{ matrix.python-version }}
@@ -51,7 +51,7 @@ jobs:
     env:
       TOXENV: ${{ matrix.toxenv }}
     steps:
-      - uses: actions/checkout@master
+      - uses: actions/checkout@v3
       - uses: actions/setup-python@v2
         with:
           python-version: 3.8

.github/workflows/codeql-analysis.yml

@@ -38,7 +38,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL