chore(ci): update to actions/checkout@v6 (#261)

Author: tottoto

.github/workflows/CI.yml

@@ -27,7 +27,7 @@ jobs:
     name: Check Style
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
         with:
           components: rustfmt
@@ -48,7 +48,7 @@ jobs:
           - macos-latest
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Install Rust (${{ matrix.rust }})
         uses: dtolnay/rust-toolchain@master
         with:
@@ -67,7 +67,7 @@ jobs:
           - macos-latest
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
       - name: Resolve MSRV aware dependencies
@@ -87,7 +87,7 @@ jobs:
     needs: [style]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@nightly
         with:
           components: miri
@@ -102,7 +102,7 @@ jobs:
     needs: [style]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
       - uses: taiki-e/install-action@cargo-hack
       - run: cargo hack --no-dev-deps check --feature-powerset --depth 2
@@ -111,7 +111,7 @@ jobs:
     name: semver
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Check semver
         uses: obi1kenobi/cargo-semver-checks-action@v2
         with:
@@ -124,6 +124,6 @@ jobs:
     needs: [style, test]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@nightly
       - run: cargo rustdoc --features full -- --cfg docsrs -D rustdoc::broken_intra_doc_links

.github/workflows/rustdoc-preview.yml

@@ -39,7 +39,7 @@ jobs:
           exit 1
 
       - name: Checkout PR branch
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           # Check out the PR's branch
           ref: refs/pull/${{ github.event.issue.number }}/head
@@ -81,7 +81,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout gh-pages branch
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: gh-pages
           persist-credentials: true