Update TestSink with single alternate name

Signed-off-by: Dinu John <86094133+dinujoh@users.noreply.github.com>

data-prepper-plugin-framework/src/test/java/org/opensearch/dataprepper/plugins/test/TestSink.java

@@ -16,7 +16,7 @@
 import java.util.stream.Collectors;
 import java.time.Instant;
 
-@DataPrepperPlugin(name = "test_sink", alternateNames = { "test_sink_alternate_name" }, deprecatedName = "test_sink_deprecated_name", pluginType = Sink.class)
+@DataPrepperPlugin(name = "test_sink", alternateNames = "test_sink_alternate_name", deprecatedName = "test_sink_deprecated_name", pluginType = Sink.class)
 public class TestSink implements Sink<Record<String>> {
     public boolean isShutdown = false;
     private final List<Record<String>> collectedRecords;