chore(deps): bump actions/checkout from 4 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/base-checks.yml

@@ -14,7 +14,7 @@ jobs:
       matrix:
         job: [lint, typecheck, test, knip]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Setup node
         uses: actions/setup-node@v4
         with:

.github/workflows/e2e.yml

@@ -12,7 +12,7 @@ jobs:
         shardIndex: [1, 2, 3, 4]
         shardTotal: [4]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           # fetch all commits so we can find the branch
           fetch-depth: 0

.github/workflows/gitlab-mirror.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Logging

.github/workflows/manual-load-test.yml

@@ -27,7 +27,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Testing GraphQL - Components
         if: always()

.github/workflows/performance-tests-pr.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Send an HTTP request to start up the server
         run: |
           curl -s '${{ github.event.deployment_status.target_url }}/api/graphql' -X 'POST' -H 'Content-Type: application/json' -d '{"operationName":"DataCubeObservations","variables":{"locale":"en","sourceType":"sparql","sourceUrl":"https://lindas.admin.ch/query","cubeFilter":{"iri":"https://energy.ld.admin.ch/sfoe/bfe_ogd84_einmalverguetung_fuer_photovoltaikanlagen/9","filters":{"https://energy.ld.admin.ch/sfoe/bfe_ogd84_einmalverguetung_fuer_photovoltaikanlagen/Kanton":{"type":"single","value":"https://ld.admin.ch/canton/1"}}}},"query":"query DataCubeObservations($sourceType: String!, $sourceUrl: DataSourceUrl!, $locale: String!, $cubeFilter: DataCubeObservationFilter!) { dataCubeObservations(sourceType: $sourceType, sourceUrl: $sourceUrl, locale: $locale, cubeFilter: $cubeFilter) }"}' > /dev/null

.github/workflows/performance-tests.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Download, unzip and install k6 binary
         run: |
             wget https://github.com/grafana/k6/releases/download/v0.49.0/k6-v0.49.0-linux-amd64.tar.gz

.github/workflows/preload-varnish-cache.yml

@@ -9,7 +9,7 @@ jobs:
   preload-varnish-cache:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v4
         with:
           node-version: 22.x