Updated description of grading in syllabus

trying to make competency based grading clearer

assignments/finding-accessibility.md

@@ -5,10 +5,9 @@ published: true
 title: AT Around Us
 code: hw3
 
-assigned: Jan 17, 2023
+assigned: Jan 24, 2023
 due: 
-   - Jan 22, 2023, 5pm Pacific
-   - Two day grace period, Jan 24, 2023, due at the start of class
+   - Jan 31, 2023, 5pm Pacific (no grace period this week because you present in class)
   
 revised: Jan 3, 2023