build(deps): 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:
         run: |
           sudo apt-get update
           sudo apt-get install nasm
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: mkroening/rust-toolchain-toml@main
       - uses: Swatinem/rust-cache@v2
       - name: Check each feature
@@ -34,7 +34,7 @@ jobs:
     name: Clippy
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install NASM
         run: |
           sudo apt-get update
@@ -48,7 +48,7 @@ jobs:
     name: Format
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: mkroening/rust-toolchain-toml@main
       - run: rustup component add rustfmt
       - run: cargo fmt -- --check
@@ -61,7 +61,7 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install nasm
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: mkroening/rust-toolchain-toml@main
       - run: rustup target add aarch64-unknown-none-softfloat
       - uses: Swatinem/rust-cache@v2
@@ -78,7 +78,7 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install nasm
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: mkroening/rust-toolchain-toml@main
       - uses: Swatinem/rust-cache@v2
       - name: Build minimal kernel
@@ -94,7 +94,7 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install qemu-system-x86 nasm
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: mkroening/rust-toolchain-toml@main
       - uses: Swatinem/rust-cache@v2
       - name: Unit tests
@@ -120,14 +120,14 @@ jobs:
           sudo apt-get update
           sudo apt-get install qemu-system-x86 nasm libcap-ng-dev libseccomp-dev
       - name: Checkout hermit-rs
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: hermitcore/hermit-rs
           submodules: true
       - name: Remove hermit-kernel submodule
         run: git rm -r kernel
       - name: Checkout hermit-kernel
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: kernel
       - uses: mkroening/rust-toolchain-toml@main
@@ -247,14 +247,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout hermit-rs
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: hermitcore/hermit-rs
           submodules: true
       - name: Remove hermit-kernel submodule
         run: git rm -r kernel
       - name: Checkout hermit-kernel
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: kernel
       - name: Download loader

.github/workflows/publish_docs.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Rustup (apply rust-toolchain.toml)
         run: rustup show
       - name: Install NASM

.github/workflows/security_audit.yml

@@ -7,7 +7,7 @@ jobs:
   security_audit:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions-rs/audit-check@v1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}