Bump actions/checkout from 2 to 4 (#6)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/check-build.yml

@@ -20,7 +20,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Install dependencies
         run: npm ci
       - name: Build

.github/workflows/deploy-preview-with-version.yml

@@ -20,7 +20,7 @@ jobs:
   preview:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Deploy to Firebase Hosting preview channel
         id: firebase_hosting_preview
         uses: ./

.github/workflows/deploy-preview.yml

@@ -20,7 +20,7 @@ jobs:
   preview:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Deploy to Firebase Hosting preview channel
         id: firebase_hosting_preview
         uses: ./

.github/workflows/deploy-production.yml

@@ -9,7 +9,7 @@ jobs:
   deploy_website:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       # - run: npm run build
       - uses: ./
         with:

.github/workflows/test.yml

@@ -20,7 +20,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Install dependencies
         run: npm ci
       - name: Check that Prettier was run