Update README.md

Author: arunkpatra

README.md

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 ## Hilights of this Repo
-| Highlight        | Notes           |
+| Hilight       | Notes           |
 | :------------- |:------------- | 
 | **Demo Site**      | Endpoint hosting REST APIs that this repository delivers. The REST APIs execute live queries on an an Amazon Redshift cluster. [REST API Demo URL](http://athenaapi-env-1.eba-9wbzews5.ap-south-1.elasticbeanstalk.com/swagger-ui.html) (Current Status: **Available**) | 
 | **Scaling Athena**      | Thoughts on how to scale this application to extreme levels beyond the expectations of the [current programming challenge](https://github.com/arunkpatra/athena/issues/11).  <ul><li>[How to scale to exabytes of data](https://github.com/arunkpatra/athena/wiki/Scaling-Athena---Redshift-and-APIs)</li><li>[How to elastically scale Athena's REST APIs](https://github.com/arunkpatra/athena/wiki/Elastically-Scaling-Athena-APIs)</li></ul> |