typo fix

Change-Id: I0a55707e145fef97798d1eb4d88cedec50c42e52
diff --git a/core/api/src/main/java/org/onosproject/net/group/GroupDescription.java b/core/api/src/main/java/org/onosproject/net/group/GroupDescription.java
index 7acf8b6..031b50b 100644
--- a/core/api/src/main/java/org/onosproject/net/group/GroupDescription.java
+++ b/core/api/src/main/java/org/onosproject/net/group/GroupDescription.java
@@ -78,7 +78,7 @@
      * Returns groupId passed in by caller.
      *
      * @return Integer group id passed in by caller. May be null if caller
-     *                 passed in null to let groupService determin the group id.
+     *                 passed in null to let groupService determine the group id.
      */
     Integer givenGroupId();