update .env.development.example

list references to how users would determine the values of the sentry variables

Author: alishaevn

.env.development.example

@@ -5,9 +5,8 @@ CLIENT_SECRET=
 NEXT_PUBLIC_TOKEN=
 
 # uncomment the “SENTRY” prefixed variables below if you are using sentry and need to catch errors in local dev
-# SENTRY_DSN=
-# NEXT_PUBLIC_SENTRY_DSN=
+# SENTRY_DSN=ref: https://docs.sentry.io/product/sentry-basics/concepts/dsn-explainer/#where-to-find-your-dsn
 # SENTRY_URL=https://sentry.io/
-# SENTRY_ORG=
-# SENTRY_PROJECT=
-# SENTRY_AUTH_TOKEN=
+# SENTRY_ORG= ref: https://github.com/getsentry/sentry-webpack-plugin#options (org)
+# SENTRY_PROJECT= ref: https://github.com/getsentry/sentry-webpack-plugin#options (project)
+# SENTRY_AUTH_TOKEN= ref: https://github.com/getsentry/sentry-webpack-plugin#options (authToken)