chore(deps): bump actions/checkout in the github-actions group

Bumps the github-actions group with 1 update: [actions/checkout](https://github.com/actions/checkout).


Updates `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
  dependency-group: github-actions
...

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

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -46,7 +46,7 @@ jobs:
           # - x86_64-unknown-netbsd
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         submodules: recursive
 
@@ -83,7 +83,7 @@ jobs:
           - armv7-linux-androideabi
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Set up Rust
       uses: dtolnay/rust-toolchain@stable
@@ -127,7 +127,7 @@ jobs:
           - i686-unknown-linux-gnu
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         submodules: recursive
 
@@ -152,7 +152,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install stable toolchain
         uses: dtolnay/rust-toolchain@stable
@@ -187,7 +187,7 @@ jobs:
       RUSTC_WRAPPER: "sccache"
       SCCACHE_GHA_ENABLED: "on"
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Install sccache
@@ -219,7 +219,7 @@ jobs:
       RUSTC_WRAPPER: "sccache"
       SCCACHE_GHA_ENABLED: "on"
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: dtolnay/rust-toolchain@stable
       with:
         components: rustfmt
@@ -235,7 +235,7 @@ jobs:
       RUSTC_WRAPPER: "sccache"
       SCCACHE_GHA_ENABLED: "on"
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: dtolnay/rust-toolchain@master
       with:
         toolchain: nightly-2025-10-09
@@ -254,7 +254,7 @@ jobs:
       RUSTC_WRAPPER: "sccache"
       SCCACHE_GHA_ENABLED: "on"
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: dtolnay/rust-toolchain@stable
       with:
         components: clippy
@@ -281,7 +281,7 @@ jobs:
       RUSTC_WRAPPER: "sccache"
       SCCACHE_GHA_ENABLED: "on"
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: dtolnay/rust-toolchain@master
       with:
         toolchain: ${{ env.MSRV }}
@@ -297,7 +297,7 @@ jobs:
     name: cargo deny
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: EmbarkStudios/cargo-deny-action@v2
         with:
           arguments: --workspace --all-features
@@ -308,6 +308,6 @@ jobs:
     timeout-minutes: 30
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - run: pip install --user codespell[toml]
     - run: codespell --ignore-words-list=ans,atmost,crate,inout,ratatui,ser,stayin,swarmin,worl --skip=CHANGELOG.md

.github/workflows/cleanup.yaml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: generated-docs-preview
       - name: Clean docs branch

.github/workflows/docs.yaml

@@ -29,7 +29,7 @@ jobs:
       PREVIEW_PATH: pr/${{ github.event.pull_request.number || inputs.pr_number }}/docs
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: dtolnay/rust-toolchain@master
       with:
         toolchain: nightly-2025-10-09

.github/workflows/tests.yaml

@@ -54,7 +54,7 @@ jobs:
       RUSTC_WRAPPER: "sccache"
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         ref: ${{ inputs.git-ref }}
 
@@ -164,7 +164,7 @@ jobs:
       RUSTC_WRAPPER: "sccache"
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         ref: ${{ inputs.git-ref }}
 
@@ -251,7 +251,7 @@ jobs:
             release-arch: aarch64
             runner: [self-hosted, macOS, ARM64]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@nightly
       - name: cargo check
         run: |