Dependabot:(deps): Bump actions/upload-artifact from 3 to 4 (#412)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v3...v4)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/ci.yml

@@ -51,7 +51,7 @@ jobs:
           }" > pr_context.json
 
       - name: Upload PR context
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: "pr_context.json"
           path: "pr_context.json"

.github/workflows/wc_publishSite.yml

@@ -61,7 +61,7 @@ jobs:
 
       - name: Upload docs ⬆️
         if: steps.prepare_scaladocs.conclusion == 'success'
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: "spark-${{ matrix.spark }}"
           path: "spark-${{ matrix.spark }}"