Add @j7nw4r as code owner for Event Hubs and Service Bus SDKs (#44585)

* Initial plan

* Add @j7nw4r as code owner for Event Hubs SDK

Co-authored-by: j7nw4r <12262567+j7nw4r@users.noreply.github.com>

* Add @j7nw4r as code owner for Service Bus SDK

Co-authored-by: j7nw4r <12262567+j7nw4r@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: j7nw4r <12262567+j7nw4r@users.noreply.github.com>

Author: Copilot

.github/CODEOWNERS

@@ -867,3 +867,9 @@
 
 /pylintrc                                                            @l0lawrence @scbedd @mccoyp
 /sdk/**/ci.yml                                                       @msyyc @lmazuel @scbedd
+
+# Add Johnathan Walker as code owner for Event Hubs SDK
+/sdk/eventhub/azure-eventhub/* @j7nw4r
+
+# Add Johnathan Walker as code owner for Service Bus SDK
+/sdk/servicebus/azure-servicebus/* @j7nw4r