Bump actions/download-artifact from 3 to 4 (#1963)

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

.github/workflows/android-ci.yml

@@ -227,7 +227,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.repository_owner == 'maplibre' && (github.ref == 'refs/heads/main' || github.ref == 'refs/heads/android-annotations')
     steps:
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: uploadsEnv
 

.github/workflows/gh-pages-mdbook.yml

@@ -34,7 +34,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Download book
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: book
           path: artifacts/book