chore: bump actions/download-artifact from 5 to 6

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v5...v6)

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

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

Author: dependabot[bot]

.github/workflows/build.yaml

@@ -241,7 +241,7 @@ jobs:
             package-lock.json
             test/package-lock.json
       - run: SKIP_SUBMODULE_DEPS=1 npm ci
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: npm-package
       - run: tar -xzf package.tar.gz
@@ -275,7 +275,7 @@ jobs:
             package-lock.json
             test/package-lock.json
       - run: SKIP_SUBMODULE_DEPS=1 npm ci
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: npm-package
       - run: tar -xzf package.tar.gz

.github/workflows/release.yaml

@@ -94,7 +94,7 @@ jobs:
           echo "$HOME/.local/bin" >> $GITHUB_PATH
 
       - name: Download npm package
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: npm-release-package
 
@@ -160,7 +160,7 @@ jobs:
       - run: brew install python-setuptools
 
       - name: Download npm package
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: npm-release-package
 
@@ -221,7 +221,7 @@ jobs:
       - run: brew install python-setuptools
 
       - name: Download npm package
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: npm-release-package
 
@@ -253,7 +253,7 @@ jobs:
     needs: npm-version
     steps:
       - name: Download npm package
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: npm-release-package