Updated the demo link for Chartbrew

Removed the underscore in case it breaks the CI test

README.md

@@ -130,7 +130,7 @@ _Web Analytics_
 
 _Business Intelligence_
 
-- [Chartbrew](https://chartbrew.com) - Open platform with which you can visualise your product's data. It connects to your DBs (MySQL, PostgreSQL, MongoDB) and APIs directly and you can get the data using the built-in query builders. ([Demo](https://chartbrew.com/b/Chartbrew_86), [Source code](https://github.com/chartbrew/chartbrew)) `MIT` `NodeJS`
+- [Chartbrew](https://chartbrew.com) - Open platform with which you can visualise your product's data. It connects to your DBs (MySQL, PostgreSQL, MongoDB) and APIs directly and you can get the data using the built-in query builders. ([Demo](https://chartbrew.com/b/Chartbrew86), [Source code](https://github.com/chartbrew/chartbrew)) `MIT` `NodeJS`
 - [Metabase](http://www.metabase.com/) - Simple Dashboarding and GUI Query tool, Nightly Emails and Slack Integration w/ PostgreSQL, MySQL, Redshift and other DBs. ([Source Code](https://github.com/metabase/metabase)) `AGPL-3.0` `Clojure`
 - [Redash](http://redash.io) - connect to over 18 types of databases (SQL and "NoSQL"), query your data, visualize it and create dashboards. Everything has a URL that can be shared. Slack and HipChat integration. ([Demo](https://demo.redash.io), [Source Code](https://github.com/getredash/redash)) `BSD-2-Clause` `Python`
 - [Superset](http://superset.apache.org/) - Modern, enterprise-ready business intelligence web application. ([Source Code](https://github.com/apache/incubator-superset)) `Apache-2.0` `Python`