[CI] Tests with latest snapshot stack version

Author: picandocodigo

.github/workflows/jruby.yml

@@ -30,7 +30,7 @@ jobs:
         sudo sysctl -w vm.max_map_count=262144
     - uses: elastic/elastic-github-actions/elasticsearch@master
       with:
-        stack-version: 8.14.0-SNAPSHOT
+        stack-version: 8.15.0-SNAPSHOT
         security-enabled: false
     - uses: ruby/setup-ruby@v1
       with:

.github/workflows/tests.yml

@@ -27,7 +27,7 @@ jobs:
         sudo sysctl -w vm.max_map_count=262144
     - uses: elastic/elastic-github-actions/elasticsearch@master
       with:
-        stack-version: 8.14.0-SNAPSHOT
+        stack-version: 8.15.0-SNAPSHOT
         security-enabled: false
     - uses: ruby/setup-ruby@v1
       with: