fix(#484): fix javadoc return typo

api/src/main/java/dev/fitko/fitconnect/api/services/Subscriber.java

@@ -58,7 +58,7 @@ public interface Subscriber {
      * Validates the structure and signature of a Security-Event-Token (SET).
      *
      * @param caseId unique identifier of a {@link Submission}s case
-     * @returna {@link ValidationResult}, contains an error if the SET is invalid
+     * @return {@link ValidationResult}, contains an error if the SET is invalid
      */
     ValidationResult validateEventLog(UUID caseId);