💚 Fix build error with java docs

Author: lpatino10

discovery/src/main/java/com/ibm/watson/developer_cloud/discovery/v1/model/NluEnrichmentEmotion.java

@@ -54,9 +54,9 @@ public NluEnrichmentEmotion build() {
     }
 
     /**
-     * Adds an targets to targets.
+     * Adds a target to targets.
      *
-     * @param targets the new targets
+     * @param target the new target
      * @return the NluEnrichmentEmotion builder
      */
     public Builder addTarget(String target) {

discovery/src/main/java/com/ibm/watson/developer_cloud/discovery/v1/model/NluEnrichmentSentiment.java

@@ -54,9 +54,9 @@ public NluEnrichmentSentiment build() {
     }
 
     /**
-     * Adds an targets to targets.
+     * Adds a target to targets.
      *
-     * @param targets the new targets
+     * @param target the new target
      * @return the NluEnrichmentSentiment builder
      */
     public Builder addTarget(String target) {