chore(deps): bump actions/upload-artifact from 3.1.3 to 4.3.1

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 3.1.3 to 4.3.1.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v3.1.3...v4.3.1)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-type: direct:production
  update-type: version-update:semver-major
...

[dhess: also, we must upgrade download-artifact at the same time,
which has been done here by me]

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

.github/workflows/build-frontend.yaml

@@ -59,7 +59,7 @@ jobs:
         run: pnpm lint --max-warnings=0
 
       - name: Archive frontend
-        uses: actions/upload-artifact@v3.1.3
+        uses: actions/upload-artifact@v4.3.1
         with:
           name: dist
           path: |

.github/workflows/deploy-frontend.yaml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Download all workflow run artifacts
-        uses: actions/download-artifact@v3.0.2
+        uses: actions/download-artifact@v4.1.4
 
       - name: Import secrets from Vault
         uses: hashicorp/[email protected]