build(deps): Bump actions/checkout from 5 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/document.yaml

@@ -12,7 +12,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/configure-pages@v5
       - uses: ./.github/actions/setup
       - run: cargo doc --all-features

.github/workflows/lint.yaml

@@ -8,26 +8,26 @@ jobs:
   clippy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/actions/setup
       - run: cargo clippy --all-features -- -D warnings
   format:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: rustup component add --toolchain nightly rustfmt
       - run: cargo +nightly fmt -- --check
   spell-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: streetsidesoftware/cspell-action@v8
         with:
           files: "**/*.{md,rs}"
   readme:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: lycheeverse/lychee-action@v2
         with:
           fail: true

.github/workflows/release.yaml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     environment: ${{ github.ref == 'refs/heads/main' && 'release' || '' }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/actions/setup
       - run: cargo install cargo-workspaces
       - uses: rust-lang/crates-io-auth-action@v1

.github/workflows/test.yaml

@@ -8,7 +8,7 @@ jobs:
   build:
     runs-on: ubuntu-24.04-arm
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/actions/setup
       - run: cargo build --all-features
   unit_test:
@@ -21,7 +21,7 @@ jobs:
           - macos-15
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/actions/setup
       - run: cargo test --all-features
   sanitize:
@@ -31,30 +31,30 @@ jobs:
       RUSTFLAGS: -Zsanitizer=address
       RUSTDOCFLAGS: -Zsanitizer=address
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/actions/setup
       - run: sed -i s/stable/nightly/ rust-toolchain.toml
       - run: cargo test -Zbuild-std --target x86_64-unknown-linux-gnu
   bench:
     runs-on: ubuntu-24.04-arm
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/actions/setup
       - run: cargo bench
   dialect_build:
     # TODO Remove this job when refactoring of dialect macros is done.
     runs-on: ubuntu-24.04-arm
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/actions/setup
       - run: cargo install cargo-expand
       - run: cd melior && cargo expand --all-features dialect::ods > ~/current.rs
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           ref: main
       - run: cd melior && cargo expand --all-features dialect::ods > ~/main.rs
       - run: diff ~/main.rs ~/current.rs
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
   test:
     needs:
       - build