Use ./gradlew run.

Signed-off-by: dblock <[email protected]>

.github/workflows/test_unreleased.yml

@@ -48,11 +48,9 @@ jobs:
           key: ${{ steps.get-key.outputs.key }}
 
       - name: Run OpenSearch
-        working-directory: opensearch/distribution/archives/linux-tar/build/distributions
+        working-directory: opensearch
         run: |
-          tar xf opensearch-min-*
-          echo "discovery.type: single-node" >> ./opensearch-*/config/opensearch.yml
-          ./opensearch-*/bin/opensearch &
+          ./gradlew run &
           for attempt in {1..20}; do sleep 5; if curl -s localhost:9200; then echo '=====> ready'; break; fi; echo '=====> waiting...'; done
       
       - name: Checkout PHP Client