Add Jason as component owner to opamp client (open-telemetry#2900)

Author: LikeTheSalad

.github/component_owners.yml

@@ -94,6 +94,7 @@ components:
   opamp-client:
     - LikeTheSalad
     - jackshirazi
+    - breedx-splk
   ibm-mq-metrics:
     - breedx-splk
     - atoulme

opamp-client/README.md

@@ -59,5 +59,6 @@ client.close();
 
 * [Cesar Munoz](https://github.com/LikeTheSalad), Elastic
 * [Jack Shirazi](https://github.com/jackshirazi), Elastic
+* [Jason Plumb](https://github.com/breedx-splk), Splunk
 
 Learn more about component owners in [component_owners.yml](../.github/component_owners.yml).