Bump actions/checkout from 2.4.0 to 3

Bumps [actions/checkout](https://github.com/actions/checkout) from 2.4.0 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/v2.4.0...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>

.github/workflows/ci-workflow.yml

@@ -14,7 +14,7 @@ jobs:
   housekeeping:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2.4.0
+    - uses: actions/checkout@v3
 
     - name: Set up Python
       uses: actions/setup-python@v3
@@ -55,7 +55,7 @@ jobs:
       matrix:
         python-version: [3.6, 3.7, 3.8, 3.9]
     steps:
-    - uses: actions/checkout@v2.4.0
+    - uses: actions/checkout@v3
 
     - uses: actions/setup-python@v3
       with:

.github/workflows/configlet.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2.4.0
+    - uses: actions/checkout@v3
 
     - name: Fetch configlet
       uses: exercism/github-actions/configlet-ci@main

.github/workflows/issue-commenter.yml

@@ -9,7 +9,7 @@ jobs:
     name: Comments for every NEW issue.
     steps:
       - name: Checkout
-        uses: actions/checkout@v2.4.0
+        uses: actions/checkout@v3
 
       - name: Read issue-comment.md
         id: issue-comment

.github/workflows/sync-labels.yml

@@ -15,7 +15,7 @@ jobs:
     name: Sync labels
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v3
       - uses: micnncim/action-label-syncer@3abd5ab72fda571e69fffd97bd4e0033dd5f495c
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/test-runner.yml

@@ -10,6 +10,6 @@ jobs:
   test-runner:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v3
       - name: Run test-runner
         run: docker-compose run test-runner