chore(deps): update dependency stacklok/toolhive-registry-server to v0.6.6 (#459)

* chore(deps): update dependency stacklok/toolhive-registry-server to v0.6.6

* chore: regenerate API client for updated registry server version

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: renovate[bot]

scripts/generate-swagger.ts

@@ -8,7 +8,7 @@ import * as path from "node:path";
  * This is managed by Renovate and updated automatically when new versions are released.
  * renovate: datasource=github-releases depName=stacklok/toolhive-registry-server versioning=semver
  */
-const REGISTRY_SERVER_VERSION = "v0.6.4";
+const REGISTRY_SERVER_VERSION = "v0.6.6";
 
 (async () => {
   const url = `https://raw.githubusercontent.com/stacklok/toolhive-registry-server/refs/tags/${REGISTRY_SERVER_VERSION}/docs/thv-registry-api/swagger.json`;