docs: update default timeout value from 3 seconds to 5 seconds

[kooskoos20]

Update incorrect default timeout value from 3 seconds to 5 seconds

[ndyakov]

@kooskoos20 in

go-redis/options.go

Line 187 in d0f9213

opt.ReadTimeout = 3 * time.Second

i can se the default is 3 seconds, not 5. Where did you get that information that the default is 5 ?