Link to crates.io OpenAPI description in docs

Author: smheidrich

app/templates/data-access.hbs

@@ -84,6 +84,10 @@
     crates.io provides an API that is a superset of the functionality required by
     the
     <a href="https://doc.rust-lang.org/cargo/reference/registry-web-api.html">Cargo Web API</a>.
+    An
+    <a href="https://blog.rust-lang.org/2025/02/05/crates-io-development-update/#openapi-description">experimental</a>
+    OpenAPI description is available at
+    <a href="https://crates.io/api/openapi.json">https://crates.io/api/openapi.json</a>.
     Should you be unable to use one of the previous options, you are welcome to
     use the crates.io API provided you abide by the following limits:
   </p>