maturity classification text

Author: philvarner

README.md

@@ -7,7 +7,7 @@
 - **Scope:** STAC API - Core
 - **[Extension Maturity Classification](https://github.com/radiantearth/stac-api-spec/tree/main/README.md#maturity-classification):** Proposal
 - **Dependencies:**
-  - [Core](https://github.com/radiantearth/stac-api-spec/tree/v1.0.0-rc.2/core)
+  - [STAC API - Core](https://github.com/radiantearth/stac-api-spec/tree/v1.0.0-rc.2/core)
 - **Owner**: @philvarner
 
 The purpose of the Aggregation Extension is to provide an endpoint similar to the Search endpoint (`/search`), but which will provide aggregated information on matching Items rather than the Items themselves. This is highly influenced by the Elasticsearch aggregation endpoint, but with a more regular structure for responses.