Added comment

Author: Mikep86

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/queries/SemanticQueryBuilder.java

@@ -218,7 +218,7 @@ private QueryBuilder doRewriteBuildSemanticQuery(SearchExecutionContext searchEx
                 case ErrorInferenceResults errorInferenceResults -> throw new InferenceException(
                     "Field [" + fieldName + "] with inference ID [" + inferenceId + "] query inference error",
                     errorInferenceResults.getException()
-                );
+                );  // Use InferenceException here so that the status code is set by the cause
                 case WarningInferenceResults warningInferenceResults -> throw new IllegalStateException(
                     "Field ["
                         + fieldName