Resolve feedback for locale string

Signed-off-by: Junqiu Lei <[email protected]>

src/main/java/org/opensearch/knn/plugin/script/KNNScoreScriptLeafFactory.java

@@ -6,6 +6,7 @@
 package org.opensearch.knn.plugin.script;
 
 import java.io.IOException;
+import java.util.Locale;
 import java.util.Map;
 
 import org.apache.lucene.index.LeafReaderContext;
@@ -45,7 +46,7 @@ private Object getValue(Map<String, Object> params, String fieldName) {
         if (value != null) return value;
 
         KNNCounter.SCRIPT_QUERY_ERRORS.increment();
-        throw new IllegalArgumentException("Missing parameter [" + fieldName + "]");
+        throw new IllegalArgumentException(String.format(Locale.ROOT, "Missing parameter [%s]", fieldName));
     }
 
     @Override