[Solved]-I am trying to include india map in my highchart code-Highcharts

I would use comments, but cannot paste the formatted code there. I will edit my answer if necessary.

I think you can't fetch your map like in your example. I was able to get your map this way:

library(highcharter)
indiageojson <- content(GET("https://raw.githubusercontent.com/codeforamerica/click_that_hood/master/public/data/india.geojson"))
indiageojson <- jsonlite::fromJSON(indiageojson)
indiageojson <- geojsonio::as.json(indiageojson)
highchart(type = "map") %>%
  hc_add_series(mapData = indiageojson)