Bump actions/checkout from 6 to 7

Bumps [actions/checkout](https://github.com/actions/checkout) from 6 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
         with:
           toolchain: ${{ matrix.rust }}
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
       - uses: Swatinem/rust-cache@v2
       - name: Test
         run: cargo test --locked --all-features
@@ -38,7 +38,7 @@ jobs:
         with:
           components: rustfmt, clippy
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
       - name: Lint check
         run: cargo lint
       - name: Format check
@@ -48,7 +48,7 @@ jobs:
     name: Check MSRV
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: 1.71.0
@@ -58,7 +58,7 @@ jobs:
     name: Check for documentation errors
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: dtolnay/rust-toolchain@stable
       - run: cargo doc --locked --all-features --no-deps --document-private-items
         env:
@@ -69,7 +69,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           persist-credentials: false
       - name: Check semver
@@ -80,7 +80,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           persist-credentials: false
       - name: Install rust toolchain
@@ -96,5 +96,5 @@ jobs:
     name: Audit dependencies
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
     - uses: EmbarkStudios/cargo-deny-action@v2