Add discussion locations to top of README
MODIFY
README.md
README.md
-# OpenTelemetry Auto-Instrumentation for Java
+# OpenTelemetry Instrumentation for Java
+
+## Join the discussions!
+
+* Watch this repo :eye:
+* Join the [Gitter channel](https://gitter.im/open-telemetry/opentelemetry-java-instrumentation)
+* Join the [weekly meeting](https://github.com/open-telemetry/community#java-instrumentation)
## Introduction

Add discussion locations to top of README (#521)

Co-authored-by: Nikita Salnikov-Tarnovski <gnikem@gmail.com>