Fix redis doc link (#884)

Co-authored-by: Diego Hurtado <[email protected]>

Author: craustin

instrumentation/opentelemetry-instrumentation-redis/README.rst

@@ -18,6 +18,6 @@ Installation
 References
 ----------
 
-* `OpenTelemetry Redis Instrumentation <https://opentelemetry-python-contrib.readthedocs.io/en/latest/instrumentation/opentelemetry-instrumentation-redis/opentelemetry-instrumentation-redis.html>`_
+* `OpenTelemetry Redis Instrumentation <https://opentelemetry-python-contrib.readthedocs.io/en/latest/instrumentation/redis/redis.html>`_
 * `OpenTelemetry Project <https://opentelemetry.io/>`_
 * `OpenTelemetry Python Examples <https://github.com/open-telemetry/opentelemetry-python/tree/main/docs/examples>`_