JavaVersionChecker lives in a different jar (#219)

This commit updates the java class string name used
to find the Java Version Checker tool.

Relates: elastic/elasticsearch#30708

src/ProcessHosts/Elastic.ProcessHosts/Elasticsearch/Process/ElasticsearchTool.cs

@@ -131,7 +131,7 @@ public bool Start(string[] arguments, TimeSpan timeout, out string output)
 
 		public static ElasticsearchTool JavaVersionChecker =>
 			new ElasticsearchTool(
-				"org.elasticsearch.tools.launchers.JavaVersionChecker",
+				"org.elasticsearch.tools.java_version_checker.JavaVersionChecker",
 				JavaConfiguration.Default,
 				ElasticsearchEnvironmentConfiguration.Default,
 				new FileSystem());