build(deps): bump actions/checkout from 4.1.4 to 4.1.5

Bumps [actions/checkout](https://github.com/actions/checkout) from 4.1.4 to 4.1.5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@0ad4b8f...44c2b7a)

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

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

.github/workflows/CI.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout
-        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b
+        uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b
       - uses: cachix/install-nix-action@8887e596b4ee1134dae06b98d573bd674693f47c
       - name: Build
         run: nix-shell --pure --run 'make SPHINXOPTS='-W' html'
@@ -24,14 +24,14 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout
-        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b
+        uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b
       - name: Build image
         run: docker build -f docs.tuleap.org/Dockerfile -t test-build .
   build_docker_image_linkcheck:
     name: Check build of the Docker image used to run linkcheck
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout
-        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b
+        uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b
       - name: Build image
         run: docker build -f build-support/linkcheck-docker.dockerfile -t test-build-linkcheck .