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](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] <support@github.com>

Author: dependabot[bot]

.github/workflows/aggregate.yml

@@ -18,7 +18,7 @@ jobs:
           sudo apt-get install -yq aspell
           pip3 install -q pyspelling
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           ssh-key: ${{ secrets.SSH_PRIVATE_KEY }}
       - run: bash aggregate-repositories.sh ${{ inputs.repository || 'neicnordic/sensitive-data-archive' }}

.github/workflows/docs.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
       with:

.github/workflows/spellcheck.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - uses: rojopolis/spellcheck-github-actions@0.51.0
       name: Spellcheck
       with: