build(deps): bump actions/download-artifact from 4 to 6

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4 to 6.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v4...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/java-release.yml

@@ -80,7 +80,7 @@ jobs:
           java-version: ${{ env.JAVA_VERSION }}
 
       - name: Download all native libraries
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           path: native-libs
 
@@ -128,7 +128,7 @@ jobs:
           java-version: ${{ env.JAVA_VERSION }}
 
       - name: Download JAR
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: java-jar
 
@@ -177,7 +177,7 @@ jobs:
           java-version: ${{ env.JAVA_VERSION }}
 
       - name: Download JAR artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: java-jar
           path: bindings/java/build/libs
@@ -199,7 +199,7 @@ jobs:
     if: startsWith(github.ref, 'refs/tags/java-v')
     steps:
       - name: Download JAR
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: java-jar
           path: dist

.github/workflows/javascript-release.yml

@@ -257,7 +257,7 @@ jobs:
         working-directory: bindings/javascript
 
       - name: Download all artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           path: artifacts
 

.github/workflows/python-release.yml

@@ -335,7 +335,7 @@ jobs:
       - pyodide
     if: "startsWith(github.ref, 'refs/tags/')"
     steps:
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v6
         with:
           path: all
       - name: Merge files