Fix typo in SENTRY_DSN sentry config (#1991)

Author: poudelprakash

config/initializers/sentry.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 Sentry.init do |config|
-  config.dsn = ENV["SENTRY_DNS"]
+  config.dsn = ENV["SENTRY_DSN"]
   config.breadcrumbs_logger = [:active_support_logger, :http_logger]
 
   # Set traces_sample_rate to 1.0 to capture 100%