Update README links for Azure monitor (Azure#16241)

Author: lzchen

sdk/monitor/azure-opentelemetry-exporter-azuremonitor/README.md

@@ -4,7 +4,7 @@
 
 The exporter for Azure Monitor allows you to export tracing data utilizing the OpenTelemetry SDK and send telemetry data to Azure Monitor for applications written in Python.
 
-[Source code](https://github.com/Azure/azure-sdk-for-python/tree/master/sdk/monitor/azure-opentelemetry-exporter-azuremonitor) | [Samples](https://github.com/Azure/azure-sdk-for-python/tree/master/sdk/monitor/azure-opentelemetry-exporter-azuremonitor/samples) | [Changelog](https://github.com/Azure/azure-sdk-for-python/blob/master/sdk/monitor/azure-opentelemetry-exporter-azuremonitor/CHANGELOG.md)
+[Source code](https://github.com/Azure/azure-sdk-for-python/tree/master/sdk/monitor/azure-opentelemetry-exporter-azuremonitor) | [Package (PyPi)][pypi] | [API reference documentation][api_docs] | [Product documentation][product_docs] || [Samples](https://github.com/Azure/azure-sdk-for-python/tree/master/sdk/monitor/azure-opentelemetry-exporter-azuremonitor/samples) | [Changelog](https://github.com/Azure/azure-sdk-for-python/blob/master/sdk/monitor/azure-opentelemetry-exporter-azuremonitor/CHANGELOG.md)
 
 ## Getting started
 
@@ -156,12 +156,14 @@ contact [opencode@microsoft.com](mailto:opencode@microsoft.com) with any additio
 
 <!-- LINKS -->
 [azure_cli]: https://docs.microsoft.com/cli/azure
+[api_docs]: https://azuresdkdocs.blob.core.windows.net/$web/python/azure-opentelemetry-exporter-azuremonitor/1.0.0b2/index.html
 [product_docs]: https://docs.microsoft.com/azure/azure-monitor/overview
 [azure_portal]: https://portal.azure.com
 [azure_sub]: https://azure.microsoft.com/free/
 [cloud_shell]: https://docs.microsoft.com/azure/cloud-shell/overview
 [cloud_shell_bash]: https://shell.azure.com/bash
 [pip]: https://pypi.org/project/pip/
+[pypi]: https://pypi.org/project/azure-opentelemetry-exporter-azuremonitor
 [python]: https://www.python.org/downloads/
 [venv]: https://docs.python.org/3/library/venv.html
 [virtualenv]: https://virtualenv.pypa.io