Bump actions/checkout from 2 to 3 (#182)

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](https://github.com/actions/checkout/compare/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>

.github/workflows/ci.yml

@@ -31,7 +31,7 @@ jobs:
           - id: protoc
             name: Check protobuf files match
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Set up Python
         uses: actions/setup-python@v3
         id: python

.github/workflows/docker.yml

@@ -20,7 +20,7 @@ jobs:
     steps:
       -
         name: Checkout source code
-        uses: actions/checkout@v2.3.4
+        uses: actions/checkout@v3
       -
         name: Log in to docker hub
         uses: docker/login-action@v1.14.1

.github/workflows/release-drafter.yml

@@ -20,7 +20,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       # Update version number in setup.py
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Calculate version
         id: version
         run: |

.github/workflows/release.yml

@@ -12,7 +12,7 @@ jobs:
     name: Build and publish to PyPi
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Set up Python
         uses: actions/setup-python@v3
         with: