Add Dubbo maintainer

Author: trask

projects/rpc-semconv.md

@@ -21,13 +21,12 @@ Stable RPC semantic conventions.
 * @trask project lead / GC sponsor
 * @lmolkova project lead / TC sponsor
 * @mconnew domain expert from [CoreWCF](https://github.com/CoreWCF/CoreWCF)
+* albumenj domain expert from [Apache Dubbo](https://github.com/apache/dubbo)
 * @SteveRao lead for [Apache Dubbo Java instrumentation](https://github.com/open-telemetry/opentelemetry-java-instrumentation/tree/main/instrumentation/apache-dubbo-2.7)
-* 
 
 ### Industry outreach
 
 - @JamesNK from .Net gRPC library - open to us reaching out as needed
-- 
 
 ### Required staffing