minor #17453 [Session] Update database.rst (ingfdoaguirre)

This PR was submitted for the 6.1 branch but it was merged into the 5.4 branch instead.

Discussion
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[Session] Update database.rst

When Redis has user and password to login, the data must be entered as an array ['user', 'password'], added as comment

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Commits
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700ae4a Update database.rst

Author: javiereguiluz

session/database.rst

@@ -50,6 +50,10 @@ First, define a Symfony service for the connection to the Redis server:
                     # uncomment the following if your Redis server requires a password
                     # - auth:
                     #     - '%env(REDIS_PASSWORD)%'
+                    
+                    # uncomment the following if your Redis server requires user and password (When user is not default)
+                    # - auth:
+                    #     - ['%env(REDIS_USER)%','%env(REDIS_PASSWORD)%']
 
     .. code-block:: xml