add sqs doc link

Author: nirsky

packages/plugin-aws-sdk/README.md

@@ -73,5 +73,10 @@ awsPluginConfig = {
 ### Specific Service Logic
 AWS contains dozens of services accessible with the JS SDK. For many services, the default attributes specified above are enough, but other services have specific [trace semantic conventions](https://github.com/open-telemetry/opentelemetry-specification/tree/master/specification/trace/semantic_conventions), or need to inject/extract intra-process context, or set intra-process context correctly.
 
+Specific service logic currently implemented for:
+* [SQS](./docs/sqs.md)
+
+---
+
 This plugin is a work in progress. We implemented some of the specific trace semantics for some of the services, and strive to support more services and extend the already supported services in the future. You can [Open an Issue](https://github.com/aspecto-io/opentelemetry-ext-js/issues), or [Submit a Pull Request](https://github.com/aspecto-io/opentelemetry-ext-js/pulls) if you want to contribute.