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/ci.yml

@@ -17,7 +17,7 @@ jobs:
     name: ${{ matrix.os }} / JDK${{ matrix.jvm }}
     runs-on: ${{ matrix.os }}-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: coursier/setup-action@v1
         with:
           jvm: temurin:${{ matrix.jvm }}
@@ -29,22 +29,22 @@ jobs:
     name: Compile docs
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: coursier/setup-action@v1
       - run: sbt ci-docs
   formatting:
     name: Scalafmt and Scalafix
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: coursier/setup-action@v1
       - run: ./bin/scalafmt --test
       - run: sbt "dogfoodScalafixInterfaces; scalafixAll --check"
   mima:
     name: Version Policy
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - uses: coursier/setup-action@v1

.github/workflows/deploy-website.yml

@@ -7,7 +7,7 @@ jobs:
   publish:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - uses: coursier/setup-action@v1

.github/workflows/release.yml

@@ -7,7 +7,7 @@ jobs:
   publish:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - uses: coursier/setup-action@v1

.github/workflows/sonatype-stats.yml

@@ -10,7 +10,7 @@ jobs:
     steps:
       - uses: coursier/cache-action@v6
       - uses: VirtusLab/[email protected]
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Checkout the gh-pages branch while keeping the scripts
         run: |
           git fetch origin gh-pages --depth 1