build(deps): bump the actions group across 1 directory with 3 updates

Bumps the actions group with 3 updates in the / directory: [actions/checkout](https://github.com/actions/checkout), [actions/upload-artifact](https://github.com/actions/upload-artifact) and [actions/download-artifact](https://github.com/actions/download-artifact).


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)

Updates `actions/upload-artifact` from 4 to 5
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...v5)

Updates `actions/download-artifact` from 4 to 6
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v4...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: actions/upload-artifact
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: actions/download-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
...

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

Author: dependabot[bot]

.github/workflows/scheduler.yml

@@ -13,7 +13,7 @@ jobs:
     name: Generate sponsors
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Setup Node
         uses: ./.github/actions/setup-node
@@ -31,7 +31,7 @@ jobs:
           SPONSORKIT_MOONCELL_PATH: './assets/data.csv'
 
       - name: Upload generated files
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: generated
           path: |
@@ -43,15 +43,15 @@ jobs:
     needs: generate-sponsors
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Setup OSS
         uses: ./.github/actions/setup-oss
         with:
           ossutil-config: ${{ secrets.OSSUTIL_CONFIG }}
 
       - name: Download results
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: generated
           path: ${{ github.workspace }}/generated