Bump actions/checkout from 3 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

---
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/build_python_runtime.yml

@@ -32,7 +32,7 @@ jobs:
       STACK_VERSION: "20"
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Build Docker image
         run: docker build --pull --tag buildenv --build-arg=STACK_VERSION builds/
       - name: Build and package Python runtime
@@ -49,7 +49,7 @@ jobs:
       STACK_VERSION: "22"
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Build Docker image
         run: docker build --pull --tag buildenv --build-arg=STACK_VERSION builds/
       - name: Build and package Python runtime

.github/workflows/check_changelog.yml

@@ -13,7 +13,7 @@ jobs:
     if: (!contains(github.event.pull_request.labels.*.name, 'skip changelog'))
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Check that CHANGELOG is touched
         run: |
           git fetch origin ${{ github.base_ref }} --depth 1 && \

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Ruby and dependencies
         uses: ruby/setup-ruby@v1
         with:
@@ -42,7 +42,7 @@ jobs:
       PARALLEL_SPLIT_TEST_PROCESSES: 60
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Ruby and dependencies
         uses: ruby/setup-ruby@v1
         with:

.github/workflows/hatchet_app_cleaner.yml

@@ -19,7 +19,7 @@ jobs:
       HEROKU_DISABLE_AUTOUPDATE: 1
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Ruby and dependencies
         uses: ruby/setup-ruby@v1
         with: