build(deps): bump actions/checkout from 4 to 5

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [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/v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/check.yml

@@ -17,7 +17,7 @@ jobs:
     if: "!contains(github.event.pull_request.title, '[skip ci]')"
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Install Nix
         uses: DeterminateSystems/nix-installer-action@main
@@ -31,7 +31,7 @@ jobs:
     if: "!contains(github.event.pull_request.title, '[skip ci]')"
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Install Nix
         uses: DeterminateSystems/nix-installer-action@main
@@ -56,7 +56,7 @@ jobs:
     if: "!contains(github.event.pull_request.title, '[skip ci]')"
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Check for typos
         uses: crate-ci/typos@master
@@ -87,7 +87,7 @@ jobs:
         uses: DeterminateSystems/nix-installer-action@main
 
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set default git branch (to reduce log spam)
         run: git config --global init.defaultBranch main
@@ -115,7 +115,7 @@ jobs:
         uses: DeterminateSystems/nix-installer-action@main
 
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Build linkcheck package
         run: nix build .#docs-linkcheck -Lv
@@ -126,7 +126,7 @@ jobs:
     if: "!contains(github.event.pull_request.title, '[skip ci]')"
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 2 # slows down checkout, but we need to compare against the previous commit on push events