Use trial version for Elasticsearch github action

Author: ezimuel

.github/workflows/test.yml

@@ -56,7 +56,7 @@ jobs:
         sudo sysctl -w vm.max_map_count=262144
 
     - name: Runs Elasticsearch ${{ matrix.es-version }}
-      uses: elastic/elastic-github-actions/elasticsearch@master
+      uses: elastic/elastic-github-actions/elasticsearch@trial
       with:
         stack-version: ${{ matrix.es-version }}