Update AButler/upload-release-assets action to v4

Author: renovate[bot]

.github/workflows/upload-release-asset.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Clean Build
         run: ./gradlew clean build
       - name: Upload Release Assets
-        uses: AButler/upload-release-assets@v3.0
+        uses: AButler/upload-release-assets@v4.0.0
         with:
           files: 'build/libs/Plot2Dynmap-*.jar'
           repo-token: ${{ secrets.GITHUB_TOKEN }}