Update docs-ref-mapping/reference-unified.yml

Co-authored-by: Srikanta <51379715+srnagar@users.noreply.github.com>

docs-ref-mapping/reference-unified.yml

@@ -666,7 +666,7 @@
     uid: azure.java.sdk.landingpage.services.monitor
     landingPageType: Service
     items:
-    - name: Opentelemetry Exporter
+    - name: OpenTelemetry Exporter
       uid: azure.java.sdk.landingpage.services.sdk.monitor.opentelemetry.exporters
       href: ~/docs-ref-services/opentelemetry-exporters-azuremonitor-readme.md
       children: