docs: replace emojis for better dark mode visibility (#3637)

Author: Anca2022

packages/documentation/src/content/docs/resources/get-involved.mdx

@@ -38,7 +38,7 @@ Before claiming an issue, ensure you have:
 - Understood the expected deliverables
 - Confirmed the issue hasn't been resolved in a recent pull request
 
-## 💻 Coding
+## 👨‍💻 Coding
 
 - <LinkOut href='https://github.com/interledger/rafiki'>Contribute</LinkOut> to Rafiki
   coding or testing.