Fix a typo.

Signed-off-by: Bo Zhang <bzhangam@amazon.com>

src/main/java/org/opensearch/neuralsearch/query/NeuralQueryBuilder.java

@@ -238,7 +238,7 @@ public NeuralQueryBuilder(StreamInput in) throws IOException {
         // The query image field was introduced since v2.11.0 through the
         // https://github.com/opensearch-project/neural-search/pull/359 but at that time we didn't add it to
         // NeuralQueryBuilder(StreamInput in) and doWriteTo(StreamOutput out) function. The fix will be
-        // introduced in v2.19.0 so we need to this for the backward compatibility.
+        // introduced in v2.19.0 so we need this check for the backward compatibility.
         if (isClusterOnOrAfterMinReqVersion(QUERY_IMAGE_FIELD.getPreferredName())) {
             this.queryText = in.readOptionalString();
             this.queryImage = in.readOptionalString();
@@ -273,6 +273,10 @@ public NeuralQueryBuilder(StreamInput in) throws IOException {
     @Override
     protected void doWriteTo(StreamOutput out) throws IOException {
         out.writeString(this.fieldName);
+        // The query image field was introduced since v2.11.0 through the
+        // https://github.com/opensearch-project/neural-search/pull/359 but at that time we didn't add it to
+        // NeuralQueryBuilder(StreamInput in) and doWriteTo(StreamOutput out) function. The fix will be
+        // introduced in v2.19.0 so we need this check for the backward compatibility.
         if (isClusterOnOrAfterMinReqVersion(QUERY_IMAGE_FIELD.getPreferredName())) {
             out.writeOptionalString(this.queryText);
             out.writeOptionalString(this.queryImage);