chore: add link to an example

Author: vmihailenco

README.md

@@ -8,7 +8,7 @@
 > go-redis is brought to you by :star: [**uptrace/uptrace**](https://github.com/uptrace/uptrace).
 > Uptrace is an open-source APM tool that supports distributed tracing, metrics, and logs. You can
 > use it to monitor applications and set up automatic alerts to receive notifications via email,
-> Slack, Telegram, and others. Star it as well!
+> Slack, Telegram, and others. See [OpenTelemetry](example/otel) example for details.
 
 ## Resources