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](https://github.com/actions/checkout/compare/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>

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
   rustfmt:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Check formatting
         run: |
@@ -22,7 +22,7 @@ jobs:
   clippy:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Run clippy
         run: |
@@ -36,7 +36,7 @@ jobs:
       CARGO_VET_REV: 28f617ea97392d527799649db588a6dbb695da8d # 0.10.2
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
 
     - uses: actions/cache@v5
       with:
@@ -68,7 +68,7 @@ jobs:
       EXPECTED_MSRV: "1.89"
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - uses: actions/cache@v5
         id: cache-cargo
@@ -100,7 +100,7 @@ jobs:
       CARGO_LLVM_COV_VERSION: v0.6.19
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - uses: actions/cache@v5
         id: cache-cargo

.github/workflows/release.yml

@@ -14,7 +14,7 @@ jobs:
       id-token: write
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - uses: rust-lang/crates-io-auth-action@bbd81622f20ce9e2dd9622e3218b975523e45bbe # v1.0.4
         id: auth