Update README.md (#1643)

* Update README.md

Change OpenCensus Lib to OpenTelemetry SDK

* Update README.md

Add link to OC

README.md

@@ -9,7 +9,7 @@
 [![Configuration UI Tests](https://github.com/inspectIT/inspectit-ocelot/workflows/Configuration%20UI%20Tests/badge.svg?branch=master)](https://github.com/inspectIT/inspectit-ocelot/actions/workflows/configuration_ui_test.yml?query=workflow%3A"Configuration+UI+Tests")
 
 [inspectIT Ocelot](https://inspectit.rocks/) is a zero-configuration Java agent for dynamically collecting application performance,
- tracing and behavior data based on the [OpenCensus library](https://opencensus.io/).
+ tracing and behavior data based on the [OpenTelemetry SDK](https://github.com/open-telemetry/opentelemetry-java) for Tracing and [OpenCensus library](https://opencensus.io/) for Metrics-Export.
 Despite the zero-configuration capability, it provides a powerful configuration feature
  which enables a full and in-depth customization of all features.
 In order to use inspectIT Ocelot, the source code of the target application does