Bump actions/download-artifact from 7 to 8

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 7 to 8.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](https://github.com/actions/download-artifact/compare/v7...v8)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '8'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/build.yml

@@ -145,12 +145,12 @@ jobs:
           node-version-file: '.node-version'
           cache: 'pnpm'
       - name: Download Server Jar
-        uses: actions/download-artifact@v6
+        uses: actions/download-artifact@v8
         with:
           name: server-jar
           path: server
       - name: Download GUI Dist
-        uses: actions/download-artifact@v6
+        uses: actions/download-artifact@v8
         with:
           name: gui-dist
       - name: Extract GUI for Electron
@@ -219,7 +219,7 @@ jobs:
       - name: Setup Gradle
         uses: gradle/actions/setup-gradle@v5
       - name: Download GUI Dist
-        uses: actions/download-artifact@v6
+        uses: actions/download-artifact@v8
         with:
           name: gui-dist
       - name: Extract GUI for Android
@@ -266,18 +266,18 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download All Release Artifacts
-        uses: actions/download-artifact@v6
+        uses: actions/download-artifact@v8
         with:
           pattern: release-*
           path: release-out
           merge-multiple: true
       - name: Download Server Jar
-        uses: actions/download-artifact@v6
+        uses: actions/download-artifact@v8
         with:
           name: server-jar
           path: server
       - name: Download GUI Dist
-        uses: actions/download-artifact@v6
+        uses: actions/download-artifact@v8
         with:
           name: gui-dist
       - name: Create GitHub Release