chore: update deprecation message (#1612)

* Add deprecation notice to README

Added deprecation notice for the repository.

* Update owlbot.py

Author: sofisl

README.md

@@ -2,6 +2,9 @@
 [//]: # "To regenerate it, use `python -m synthtool`."
 <img src="https://avatars2.githubusercontent.com/u/2810941?v=3&s=96" alt="Google Cloud Platform logo" title="Google Cloud Platform" align="right" height="96" width="96"/>
 
+**_THIS REPOSITORY IS DEPRECATED We encourage users to migrate to [OpenTelemetry JS Instrumentation][otel] instead._**
+
+
 # [Cloud Trace: Node.js Client](https://github.com/googleapis/cloud-trace-nodejs)
 
 [![release level](https://img.shields.io/badge/release%20level-preview-yellow.svg?style=flat)](https://cloud.google.com/terms/launch-stages)

owlbot.py

@@ -20,6 +20,7 @@
   '.github/workflows/ci.yaml',
   '.nycrc',
   '.prettierignore',
+  'README.md'
 ])
 
 ### SUPPORT DATABASE PLUGINS ###