Update README.md

README.md

@@ -13,7 +13,7 @@ Get all the details about the event at the [luma page](https://lu.ma/roboticshac
 
 Each team need to:
 1. submit dataset they recorded during the hackathon
-2. submit video (no longer than 1 min) that explains team's project
+2. submit video (no longer than 2 mins) that explains team's project
 
 ## Joining this organization