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] <[email protected]>

Author: dependabot[bot]

.github/workflows/dash0.yml

@@ -12,7 +12,7 @@ jobs:
   otel-export-dash0:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Export workflow to Dash0
         uses: corentinmusard/otel-cicd-action@v2
         with:

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
   test:
     runs-on: 'ubuntu-latest'
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Install dependencies
       run: sudo apt -y install shellcheck
     - name: Run ShellCheck

.github/workflows/update.yml

@@ -13,7 +13,7 @@ jobs:
   update:
     runs-on: 'ubuntu-latest'
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Install dependencies
       run: sudo apt -y install jq jo perl curl parallel
     - name: Run update script

.github/workflows/validate.yml

@@ -10,7 +10,7 @@ jobs:
   validate:
     runs-on: 'ubuntu-latest'
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Install dependencies
       run: sudo apt -y install jq curl
     - name: Run validation script