update conferences.md - add react day bangalore to the list (#2681)

* add react day bangalore to the list

* update conferences.md

Author: kamleshchandnani

content/community/conferences.md

@@ -45,7 +45,7 @@ April 23 - 24, 2020 in Kraków, Poland
 ### React Day Bangalore 2020 {#react-day-bangalore-2020}
 April 25, 2020 in Bangalore, India
 
-[Website](https://reactday.in) - [Twitter](https://twitter.com/ReactDayIn)
+[Website](https://reactday.in) - [Twitter](https://twitter.com/ReactDayIn) - [LinkedIn](https://www.linkedin.com/company/react-day/)
 
 ### render(ATL) 2020 {#render-atlanta-2020}
 May 4-6, 2020. Atlanta, GA, USA.