[Monitor OpenTelemetry][Monitor OpenTelemetry Exporter] Update codeowners to Include Nev (#32725)

### Packages impacted by this PR
@azure/monitor-opentelemetry
@azure/monitor-opentelemetry-exporter

### Describe the problem that is addressed by this PR
Add Nev to codeowners.

### Checklists
- [x] Added impacted package name to the issue description
- [ ] Does this PR needs any fixes in the SDK Generator?** _(If so,
create an Issue in the
[Autorest/typescript](https://github.com/Azure/autorest.typescript)
repository and link it here)_
- [x] Added a changelog (if necessary)

.github/CODEOWNERS

@@ -984,8 +984,8 @@ sdk/ai/ai-inference-rest @glharper @dargilco @jhakulin
 
 # PRLabel: %Monitor
 /sdk/monitor/monitor-ingestion/ @srnagar @lmolkova @Azure/azure-sdk-write-monitor-data-plane
-/sdk/monitor/monitor-opentelemetry @hectorhdzg @JacksonWeber @harsimar
-/sdk/monitor/monitor-opentelemetry-exporter @hectorhdzg @JacksonWeber @harsimar
+/sdk/monitor/monitor-opentelemetry @hectorhdzg @JacksonWeber @harsimar @MSNev
+/sdk/monitor/monitor-opentelemetry-exporter @hectorhdzg @JacksonWeber @harsimar @MSNev
 /sdk/monitor/monitor-query/ @srnagar @lmolkova @Azure/azure-sdk-write-monitor-data-plane
 /sdk/monitor/perf-tests/ @srnagar @Azure/azure-sdk-write-monitor-data-plane