Update README.md

changed brain-life to brainlife in a URL to Amaretti DOC

Author: francopestilli

README.md

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 Amaretti is a light-weight, cross-resource, multi-user task orchestration service written in nodejs. Amaretti is a meta processing management system; it provides cross-resource orchestration relying on the individual resources batch scheduling systems. It manages data and computation execution across multiple architectures (e.g., clouds and high-performance computing). Its purpose is to reduce the users' management burden, facilitate data-intensive research and development and accelerate discovery.
 
-For more information, please read [Amaretti Doc](https://brain-life.github.io/amaretti/)
+For more information, please read [Amaretti Doc](https://brainlife.github.io/amaretti/)
 
 ### Authors
 - Soichi Hayashi ([email protected])