Apply suggestion from @Copilot

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: dermatz

.github/workflows/magento-compatibility.yml

@@ -37,6 +37,7 @@ jobs:
         env:
           discovery.type: single-node
           xpack.security.enabled: false
+          ES_JAVA_OPTS: "-Xms512m -Xmx512m"
         ports:
           - 9200:9200
         options: --health-cmd="curl -s http://localhost:9200/_cluster/health" --health-interval=10s --health-timeout=5s --health-retries=10