Update _syllabus-page.mdx

Update new Discord Link with no expired date

documentation/src/pages/_syllabus-page.mdx

@@ -293,7 +293,7 @@ You are free to conduct team meetings, have discussions about your projects, get
 Please make sure that you change your nickname to your full name!
 :::
 
-<Figure src={"https://api.qrserver.com/v1/create-qr-code/?size=250x250&data=https://discord.gg/qked9PmQ"} caption={"Scan QR Code above to join Discord Server"} />
+<Figure src={"https://api.qrserver.com/v1/create-qr-code/?size=250x250&data=https://discord.gg/WaNd5scPpC"} caption={"Scan QR Code above to join Discord Server"} />