chore(deps): bump actions/checkout from 2 to 3 (#209)

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>

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

Author: dependabot[bot]

.github/workflows/ci_static-analysis.yaml

@@ -31,7 +31,7 @@ jobs:
           - pylint-examples
           - black-check
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-python@v2
         with:
           python-version: 3.8

.github/workflows/ci_tests.yaml

@@ -37,7 +37,7 @@ jobs:
 #          - integ-slow
 #          - examples
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-python@v2
         with:
           python-version: ${{ matrix.python }}
@@ -59,7 +59,7 @@ jobs:
           - sourcebuildcheck
           - test-upstream-requirements-py37
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-python@v1
         with:
           python-version: 3.7

.github/workflows/repo-sync.yml

@@ -9,7 +9,7 @@ jobs:
     environment: repo-sync
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - uses: repo-sync/github-sync@v2
       name: Sync repo to branch
       with: