Fix formatting

lesson_plans/20240827/20240827_richel.md

@@ -133,7 +133,7 @@ I want 8 groups max. Yup, so 3 per group will work.
 
 9 already logged in to Rackham for sure:
 
-``bash
+```bash
 [richel@rackham2 completed]$ ls
 elinhb  julrec  majavuk  manues  naurasd  olgac  sarao  shab0024  vicgo
 ```