Update pull_request_template.md

Added Ethereum address

Author: Noc2

.github/pull_request_template.md

@@ -1,7 +1,7 @@
 # Grant Application Checklist
 
 - [ ] The [application-template.md](https://github.com/w3f/Open-Grants-Program/blob/master/applications/application-template.md) has been copied, renamed ( "project_name.md") and updated.
-- [ ] A BTC address for the payment of the milestones is provided inside the application.  
+- [ ] A BTC or Ethereum address for the payment of the milestones is provided inside the application.  
 - [ ] The software of the project will be released under the Apache license version 2.0 as specified in the [terms and conditions](https://gist.github.com/Noc2/75bc58e8ce9b5d419ff883b0cf2b8c19).
 - [ ] The total funding amount of the project is below USD $30k for initial grant applications and $100k for follow-up grants at the time of submission.
 - [ ] The initial PR contains only one commit (squash if needed before submitting your PR).