Fix typo in readme (open-telemetry#1390)

Fix typo

Co-authored-by: Tyler Yahn <[email protected]>

Author: rabunkosar-dd

example/otel-collector/README.md

@@ -7,7 +7,7 @@ The complete flow is:
 
 ```
                                           -----> Jaeger (trace)
-App + SDK ---> OpenTelemtry Collector ---|
+App + SDK ---> OpenTelemetry Collector ---|
                                           -----> Prometheus (metrics)
 ```