Fix changelog PR link (Azure#34713)

Author: vishweshbankwar

sdk/monitor/Azure.Monitor.OpenTelemetry.Exporter/CHANGELOG.md

@@ -14,7 +14,7 @@
 * `dependencies\duration` and `requests\duration` standard metrics will now be
   exported by default when trace exporter is used alongside metric exporter
   ([#34010](https://github.com/Azure/azure-sdk-for-net/pull/34010))
-  ([#33999](https://github.com/Azure/azure-sdk-for-net/pull/33999))
+  ([#33955](https://github.com/Azure/azure-sdk-for-net/pull/33955))
 
 * Added support for named options ([#33803](https://github.com/Azure/azure-sdk-for-net/pull/33803))