refactor: refer to angular.json instead of angular-cli.json (#641)

Point to correct file. angular-cli.json does not exist anymore.

src/environments/environment.ts

@@ -1,7 +1,7 @@
 // The file contents for the current environment will overwrite these during build.
 // The build system defaults to the dev environment which uses `environment.ts`, but if you do
 // `ng build --env=prod` then `environment.prod.ts` will be used instead.
-// The list of which env maps to which file can be found in `.angular-cli.json`.
+// The list of which env maps to which file can be found in `.angular.json`.
 
 export const environment = {
   production: false