chore(deps): bump actions/upload-artifact from 4 to 5

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

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  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/blog.yaml

@@ -42,7 +42,7 @@ jobs:
           API_KEY: ${{ secrets.DELPHI_GITHUB_ACTIONS_EPIDATA_API_KEY }}
         run: |
           npm run build:blog
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: blog
           path: |

.github/workflows/ci.yaml

@@ -26,7 +26,7 @@ jobs:
       - name: Build
         run: npm run build
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: website
           path: ./public