Update _syllabus-page.mdx

Update Thanh's office-hours link for Software Design course

documentation/src/pages/_syllabus-page.mdx

@@ -102,9 +102,7 @@ If the scheduling widget doesn't appear use the following Calendly link: https:/
 
 #### Thanh Nguyen
 
-- Monday, 1:00-2:00 PM in Person **SERC 325**
-
-- Friday, 1:00-2:00 PM in Person **SERC 325**
+- Schedule using [Calendly](https://calendly.com/thanh-phuoc-nguyen/office-hours/) - online via **Zoom**
 
 <div>
 <Figure caption={"Class Moto:"} subcaption={"Design is not just about how something looks."}>