Updated the readme

Author: Kazumasa Yokomizo

readme.md

@@ -1,4 +1,4 @@
-:mega: The Boostnote team uses [IssueHunt](https://issuehunt.io/) for a sustainable open-source ecosystem.
+:mega: The renewal will be released end of Nov, 2019. [To keep updated, subscribe our mailing list!](https://boostnote.io/#subscribe)
 
 ![Boostnote app screenshot](./resources/repository/top.png)
 
@@ -14,7 +14,6 @@
 ## Authors & Maintainers
 
 - [Rokt33r](https://github.com/rokt33r)
-- [Sosuke](https://github.com/sosukesuzuki)
 - [Kazz](https://github.com/kazup01)
 - [ZeroX-DG](https://github.com/ZeroX-DG)
 
@@ -33,7 +32,7 @@ Issues on Boostnote can be funded by anyone and the money will be distributed to
 ## Community
 - [Facebook Group](https://www.facebook.com/groups/boostnote/)
 - [Twitter](https://twitter.com/boostnoteapp)
-- [Slack Group](https://join.slack.com/t/boostnote-group/shared_invite/enQtMzkxOTk4ODkyNzc0LThkNmMzY2VlZjVhYTNiYjE5YjQyZGVjNTJlYTY1OGMyZTFjNGU5YTUyYjUzOWZhYTU4OTVlNDYyNDFjYWMzNDM)
+- [Slack Group](https://join.slack.com/t/boostnote-group/shared_invite/enQtMzkxOTk4ODkyNzc0LWQxZTQwNjBlMDI4YjkyYjg2MTRiZGJhNzA1YjQ5ODA5M2M0M2NlMjI5YjhiYWQzNzgzYmU0MDMwOTlmZmZmMGE)
 - [Blog](https://medium.com/boostnote)
 - [Reddit](https://www.reddit.com/r/Boostnote/)