docs: update README.md

closes #133

Author: insertish

README.md

@@ -151,7 +151,7 @@ chmod +x ./generate_config.sh
 ./generate_config.sh your.domain
 ```
 
-You can find [more options here](https://github.com/revoltchat/backend/blob/df074260196f5ed246e6360d8e81ece84d8d9549/crates/core/config/Revolt.toml), some noteworthy configuration options:
+You can find [more options here](https://github.com/revoltchat/backend/blob/stable/crates/core/config/Revolt.toml), some noteworthy configuration options:
 
 - Email verification
 - Captcha