fix link in request tracker docs

Author: joao-r-reis

doc/features/request-tracker/README.md

@@ -1,7 +1,8 @@
 # Request Tracker
 
-The driver provides the `IRequestTracker` interface that tracks the requests at Session and Node levels. It contains *start*, *finish*, and *error* events that can be subscribed by implementing the interface, and should be used by passing the implementation as an argument of the method `WithRequestTracker` that is available in the `Builder`.\
-An example of an `IRequestTracker` implementation is the extension package `Cassandra.OpenTelemetry` that can be checked in the [documentation](../opentelemetry/README.md).
+The driver provides the `IRequestTracker` interface that tracks the requests at Session and Node levels. It contains *start*, *finish*, and *error* events that can be subscribed by implementing the interface, and should be used by passing the implementation as an argument of the method `WithRequestTracker` that is available in the `Builder`.
+
+An example of an `IRequestTracker` implementation is the extension package `Cassandra.OpenTelemetry` that can be checked in the [documentation](../opentelemetry).
 
 ## Available events