confirm vested DOT (#2249)

Co-authored-by: Sebastian Müller <[email protected]>

.github/pull_request_template.md

@@ -15,6 +15,7 @@
 - [x] The [application template](https://github.com/w3f/Grants-Program/blob/master/applications/application-template.md) has been copied and aptly renamed (`project_name.md`).
 - [ ] I have read the [application guidelines](https://github.com/w3f/Grants-Program/blob/master/docs/Support%20Docs/grant_guidelines_per_category.md).
 - [ ] Payment details have been provided (Polkadot AssetHub (DOT, USDC & USDT) address in the application and bank details via email, if applicable).
+- [ ] I understand that 30% of each milestone will be paid in vested DOT, to the Polkadot AssetHub address listed in the application.
 - [ ] I am aware that, in order to receive a grant, I (and the entity I represent) have to successfully complete a KYC/KYB check.
 - [ ] The software delivered for this grant will be released under an open-source license specified in the application.
 - [ ] The initial PR contains only one commit (squash and force-push if needed).