Apply suggestions from code review

Co-authored-by: leangseu-edx <83240113+leangseu-edx@users.noreply.github.com>

src/data/selectors/grading.js

@@ -76,7 +76,7 @@ selected.gradingStatus = createSelector(
 );
 
 /***********************************
- * Selected Submission - Statuc Data
+ * Selected Submission - Static Data
  ***********************************/
 
 /**
@@ -194,7 +194,7 @@ const prev = {
     (activeIndex) => activeIndex > 0,
   ),
   /**
-   * Returns the submissionId for the previous submission in the selection queu
+   * Returns the submissionId for the previous submission in the selection queue
    * @return {string} previous submission id (null if there isn't one)
    */
   submissionId: createSelector(

src/data/services/lms/fakeData/ora.js

@@ -48,7 +48,7 @@ const rubricConfig = {
           orderNum: 3,
           name: 'excellent',
           label: 'Excellent',
-          explanation: 'Includes in-depth information and exceptional supportint details that are fully developed.  Explores all facets of the topic',
+          explanation: 'Includes in-depth information and exceptional supporting details that are fully developed.  Explores all facets of the topic',
           points: 3,
           feedback: 'optional',
         },