update changelog

Author: JakeDawkins

CHANGELOG.md

@@ -5,6 +5,7 @@
 - `apollo`
   - Update shortlinks to use go.apollo.dev instead of bitly [#1790](https://github.com/apollographql/apollo-tooling/pull/1790)
   - Support disabling literal stripping when extracting queries.  [1703](https://github.com/apollographql/apollo-tooling/pull/1703)
+  - Add ability to define schema download output path that doesn't exist yet [#1807](https://github.com/apollographql/apollo-tooling/pull/1807)
 - `apollo-codegen-flow`
   - Add @generated comment
 - `apollo-codegen-scala`