Fix the private datasheet link in POINTS.md (#568)

POINTS.md

@@ -8,7 +8,7 @@ We might adjust the point requirement lower to accommodate more co-authorship if
 | Contribution type              | Demand              | Points | Max points              | Job description                                                                                                          |
 | ------------------------------ | ------------------- | ------ | ----------------------- | ------------------------------------------------------------------------------------------------------------------------ |
 | Public Datasheet Submission    | As many as possible | 2+bonus      | 6                       | Submit public datasheet via [jotform](https://www.jotform.com/team/232952680898069/seacrowd-sea-datasets)                                                                                   |
-| Private Datasheet Submission   | As many as possible | 1      |                         | Submit private datasheet via [jotform](https://www.jotform.com/team/232952680898069/seacrowd-sea-datasets)                                                                                  |
+| Private Datasheet Submission   | As many as possible | 1      |                         | Submit private datasheet via [jotform](https://www.jotform.com/team/232952680898069/seacrowd-paper-with-private-dataset)                                                                                  |
 | Open Access to Private Dataset | As many as possible | 4+bonus     | 10 for the high-quality | Only private dataset owners can do this. Upload the data in a public repository and submit the datasheet in [jotform](https://www.jotform.com/team/232952680898069/seacrowd-sea-datasets). |
 | Dataloader Implementation      | As many as possible | 3      | 6 for the hard one      | Implement dataloader based on the respective dataset's schema and task.                                                  |