chore: fix location of open api spec and add link to swagger

Author: commoddity

docusaurus/docs/explore/api.md

@@ -0,0 +1,18 @@
+---
+title: Open API Spec
+sidebar_position: 4
+---
+
+import OpenAPI from '@site/src/components/OpenAPI';
+
+# API Documentation
+
+The below OpenAPI spec for the Shannon protocol is autogenerated by the [Ignite CLI](https://docs.ignite.com/).
+
+:::note
+
+This spec may also be viewed in the online [Swagger UI editor](https://editor.swagger.io/?url=https://raw.githubusercontent.com/pokt-network/poktroll/refs/heads/main/docs/static/openapi.yml).
+
+:::
+
+<OpenAPI />