fix: Fix mdx file

Author: NicoMolinaOZ

content/relayer/api/callPlugin.mdx

@@ -25,4 +25,4 @@ Logs and traces are only returned when the plugin is configured with `emit_logs`
 Plugin-provided errors are normalized into a consistent payload (`code`, `details`) and a derived
 message so downstream clients receive a stable shape regardless of how the handler threw.
 
-<APIPage document={"https://raw.githubusercontent.com/OpenZeppelin/openzeppelin-relayer/refs/heads/release-v1.3.0/openapi.json"} operations={[{"path":"/api/v1/plugins/{plugin_id}/call","method":"post"}]} webhooks={[]} hasHead={false} />
+<APIPage document={"https://raw.githubusercontent.com/OpenZeppelin/openzeppelin-relayer/refs/heads/main/openapi.json"} operations={[{"path":"/api/v1/plugins/{plugin_id}/call","method":"post"}]} webhooks={[]} hasHead={false} />