Update checklist.md with blazer IDs

checklist.md

@@ -13,7 +13,8 @@ Steps can be performed by any Teachers and Instructors unless otherwise noted.
     - Please visit [Canvas: Course Cross-Listing SLA page](https://uabprod.service-now.com/service_portal?id=sc_cat_item&sys_id=393e9275377d630024a67c1643990e27).
 - [ ] Add course Teachers and Instructors as needed.
     - Must be done by [IOR](#abbreviations) _after_ merge step is complete! Otherwise, adds may need to be redone.
-    - Please visit [Canvas: Add/Remove User(s) SLA page](https://uabprod.service-now.com/service_portal?id=sc_cat_item&sys_id=76f97b59374a670024a67c1643990ece).
+    - Please visit [Canvas: Add/Remove User(s) SLA page](https://uabprod.service-now.com/service_portal?id=sc_cat_item&sys_id=76f97b59374a670024a67c1643990ece)
+    - add wwarr for William Warriner, and ravi89 for Ravi Tripathi, and mdefende for Matt Defenderfer.
 - [ ] Upload [Syllabus HTML](syllabus.html)
     1. Navigate to Syllabus page.
     2. Switch text entry box to raw HTML mode by clicking `</>` symbol at bottom-right of box.