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

@@ -22,7 +22,7 @@ jobs:
           components: rustfmt
 
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Check Formatting
         uses: actions-rs/cargo@v1
@@ -59,7 +59,7 @@ jobs:
         uses: Swatinem/rust-cache@v2
 
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Check each crate
         run: |
@@ -83,7 +83,7 @@ jobs:
         uses: Swatinem/rust-cache@v2
 
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
         # Check permissions of GITHUB_TOKEN, workaround for permission issues
         # with @dependabot PRs. See https://github.com/actions-rs/clippy-check/issues/2#issuecomment-807878478
@@ -130,7 +130,7 @@ jobs:
       RUST_BACKTRACE: full
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install stable toolchain
         uses: actions-rs/toolchain@v1
@@ -174,7 +174,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install stable toolchain
         uses: actions-rs/toolchain@v1

.github/workflows/dependabot-auto-merge.yml

@@ -5,7 +5,7 @@ jobs:
   merge:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ahmadnassri/action-dependabot-auto-merge@v2
         with:
           target: patch

.github/workflows/release-image.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out the repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Log in to Docker Hub
         uses: docker/login-action@v2