Bump actions/checkout from 4 to 5 (#90)

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](actions/checkout@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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -29,7 +29,7 @@ jobs:
       matrix: ${{ fromJSON(needs.generate-matrix.outputs.matrix) }}
     steps:
       - name: Checkout base repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Set up Haskell
         id: setup-haskell
         uses: haskell-actions/setup@v2

.github/workflows/ghc-nightly.yaml

@@ -11,7 +11,7 @@ jobs:
     name: Tests on GHC Nightly
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: haskell/ghcup-setup@v1
       - name: Setup GHC Nightly
         run: |

.github/workflows/lint-actions.yml

@@ -5,7 +5,7 @@ jobs:
   actionlint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Download actionlint
         id: get_actionlint
         run: bash <(curl https://raw.githubusercontent.com/rhysd/actionlint/main/scripts/download-actionlint.bash)

.github/workflows/linting.yml

@@ -9,7 +9,7 @@ jobs:
   fourmolu:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
 
     - uses: fourmolu/fourmolu-action@v11
       with:
@@ -20,7 +20,7 @@ jobs:
   hlint:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
 
     - name: 'Set up HLint'
       uses: haskell-actions/hlint-setup@v2