Bump actions/checkout from 4 to 5 in the github-actions group

Bumps the github-actions group with 1 update: [actions/checkout](https://github.com/actions/checkout).


Updates `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
  dependency-group: github-actions
...

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

Author: dependabot[bot]

.github/workflows/build-push-test-docker-image.yml

@@ -13,7 +13,7 @@ jobs:
       packages: write
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Build the app
         uses: openconext/build-and-publish-test-container/php82-node20@main

.github/workflows/test-integration.yml

@@ -6,10 +6,10 @@ jobs:
         timeout-minutes: 30
         steps:
             - name: Checkout
-              uses: actions/checkout@v4
+              uses: actions/checkout@v5
 
             - name: Checkout devconf
-              uses: actions/checkout@v4
+              uses: actions/checkout@v5
               with:
                 repository: OpenConext/OpenConext-devconf
                 ref: main