minor #19620 [Cache] Update github link for method in Redis adapter (MrYamous)

This PR was merged into the 5.4 branch.

Discussion
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[Cache] Update github link for method in Redis adapter

To reach the class where the method is implemented. It seems clearer to me WDYT ?

Commits
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2bf73a7 update github link for method in redis adapter

Author: javiereguiluz

components/cache/adapters/redis_adapter.rst

@@ -44,7 +44,7 @@ as the second and third parameters::
 Configure the Connection
 ------------------------
 
-The :method:`Symfony\\Component\\Cache\\Adapter\\RedisAdapter::createConnection`
+The :method:`Symfony\\Component\\Cache\\Traits\\RedisTrait::createConnection`
 helper method allows creating and configuring the Redis client class instance using a
 `Data Source Name (DSN)`_::