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/coverage.yml

@@ -10,7 +10,7 @@ jobs:
       options: --security-opt seccomp=unconfined
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Cache cargo
         uses: actions/cache@v4

.github/workflows/rust-audit.yaml

@@ -24,7 +24,7 @@ jobs:
           path: target
           key: ${{ runner.os }}-stable-cargo-build-target-${{ hashFiles('**/Cargo.lock') }}
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           submodules: "recursive"
 

.github/workflows/rust.yml

@@ -24,7 +24,7 @@ jobs:
           git config --global core.autocrlf false
           git config --global core.eol lf
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           submodules: "recursive"