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] <[email protected]>

.github/workflows/auto-merge.yml

@@ -18,7 +18,7 @@ jobs:
         with:
           github-token: "${{ secrets.GITHUB_TOKEN }}"
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           # use ref here so we're on the HEAD of the PR branch
           ref: ${{ github.event.pull_request.head.ref }}

.github/workflows/main.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-22.04
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install Node.js
         uses: actions/setup-node@v3
@@ -43,7 +43,7 @@ jobs:
     runs-on: ubuntu-22.04
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: "actions/setup-python@v4"
         with:
           python-version: "3.10"
@@ -58,7 +58,7 @@ jobs:
     runs-on: ubuntu-22.04
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: "actions/setup-python@v4"
         with:
           python-version: "3.10"
@@ -82,7 +82,7 @@ jobs:
   lint-dockerfile:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: hadolint/[email protected]
         with:
           dockerfile: docker/Dockerfile
@@ -92,7 +92,7 @@ jobs:
     runs-on: ubuntu-22.04
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: extractions/setup-just@95b912dc5d3ed106a72907f2f9b91e76d60bdb76  # v1.5.0
 
       - name: Run unit tests on docker dev image
@@ -104,7 +104,7 @@ jobs:
     runs-on: ubuntu-22.04
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: extractions/setup-just@95b912dc5d3ed106a72907f2f9b91e76d60bdb76  # v1.5.0
 
       - name: Run smoke test on prod image
@@ -127,7 +127,7 @@ jobs:
     if: github.ref == 'refs/heads/main'
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0