chore(deps): Bump actions/checkout from 5 to 6 in the all-actions group

Bumps the all-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: all-actions
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/audit.yml

@@ -21,7 +21,7 @@ jobs:
   audit:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - id: install
         run: |
           rustup override set stable

.github/workflows/main.yml

@@ -31,7 +31,7 @@ jobs:
     name: Format
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Update Rust toolchain to stable
         run: |
           rustup override set stable
@@ -44,7 +44,7 @@ jobs:
     name: Dependencies
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Update Rust toolchain to stable
         run: |
           rustup override set stable
@@ -56,7 +56,7 @@ jobs:
     name: Typos
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Update Rust toolchain to stable
         run: |
           rustup override set stable
@@ -71,7 +71,7 @@ jobs:
     name: Lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Install Protocol Buffers compiler
         run: sudo apt-get update && sudo apt-get install -y protobuf-compiler libprotobuf-dev clang mold
       - name: Cache Rust dependencies
@@ -107,7 +107,7 @@ jobs:
       ###############################
       ##           Setup           ##
       ###############################
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Setup go-task
         run: if [ ! -f "~/.local/bin/task" ]; then curl -sSf https://taskfile.dev/install.sh | sh -s -- -b ~/.local/bin; fi
       - name: Set up Docker Buildx