add "an" to README file

Author: Dagim-Daniel

readme.md

@@ -24,7 +24,7 @@ graph LR
 
 ## 📅 Planning and managing your work
 
-All the coursework is listed as issues on this repo. These issues are mirrored on your curriculum backlog page.
+All the coursework is listed as an issues on this repo. These issues are mirrored on your curriculum backlog page.
 
 You will copy these issues to your Coursework Planner, which is one repo that will hold all your coursework and assignments for the entire course.