Bump the github-actions group with 2 updates

Bumps the github-actions group with 2 updates: [actions/checkout](https://github.com/actions/checkout) and [technote-space/workflow-conclusion-action](https://github.com/technote-space/workflow-conclusion-action).


Updates `actions/checkout` from 2 to 6
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v6)

Updates `technote-space/workflow-conclusion-action` from 2 to 3
- [Release notes](https://github.com/technote-space/workflow-conclusion-action/releases)
- [Commits](technote-space/workflow-conclusion-action@v2...v3)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: technote-space/workflow-conclusion-action
  dependency-version: '3'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

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

Author: dependabot[bot]

.github/workflows/build.yaml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v6
         with:
           ref: ${{ github.ref }}
 
@@ -67,7 +67,7 @@ jobs:
     runs-on: ubuntu-latest
     if: always()
     steps:
-      - uses: technote-space/workflow-conclusion-action@v2
+      - uses: technote-space/workflow-conclusion-action@v3
       - uses: 8398a7/action-slack@v3
         with:
           status: failure

.github/workflows/tests.yaml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Setup PHP ${{ matrix.php }}
         uses: shivammathur/setup-php@v2

.github/workflows/trigger-skeletons.yml

@@ -22,7 +22,7 @@ jobs:
       WORKFLOW: "build-skeleton.yml"
       AUTH: ":${{secrets.GLOBAL_TOKEN}}"
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v6
       - name: Make it rain ☔️
         run: |
           SKELETONS=`curl -s "${{secrets.SKELETONS_JSON_LIST}}"`