docs(website): added a link to GitHub signup

Author: jan-molak

src/docs/community/index.mdx

@@ -11,9 +11,12 @@ At Serenity/JS, we're more than just a testing framework;
 we're a thriving community of passionate developers, testers, and quality assurance enthusiasts
 who are dedicated to pushing the boundaries of test automation.
 
-Our community is a safe space where we all aim to grow and learn together,
-and where everyone is welcome to contribute. Whether you're a seasoned developer or just starting out,
-there's a place for you in our community.
+Our community is a safe space where we all aim to grow and learn together, and where everyone is welcome to contribute.
+Whether you're a seasoned developer or just starting out, there's a place for you in our community.
+
+:::tip We're on GitHub
+To fully participate in the Serenity/JS Community, you'll need a free [GitHub account](https://github.com/signup).
+:::
 
 ## Serenity/JS Community Forums
 
@@ -30,7 +33,7 @@ Check out the below categories to get started:
 
 Please make sure to star [**⭐️ Serenity/JS on GitHub**](https://github.com/serenity-js/serenity-js) to help others discover the framework!
 
-You can also use the [Serenity/JS GitHub issue tracker](https://github.com/serenity-js/serenity-js/issues) to open a ticket to:
+Use the [Serenity/JS GitHub issue tracker](https://github.com/serenity-js/serenity-js/issues) to open a ticket to:
 - [Report a bug 🐛](https://github.com/serenity-js/serenity-js/issues/new?assignees=&labels=&projects=&template=bug_report.yml&title=Feature+X+fails+when+Y+happens)
 - [Request a feature ⭐️](https://github.com/serenity-js/serenity-js/issues/new?assignees=&labels=&projects=&template=feature_request.yml&title=Serenity%2FJS+should+...)
 - [Report a security vulnerability 🧐](https://github.com/serenity-js/serenity-js/security/advisories/new)