Update ActiveSupport::Cache::RedisCacheStore documentation

For more info:
* rails#46149
* rails#46204

Author: kuranari

guides/source/caching_with_rails.md

@@ -507,9 +507,8 @@ is often faster than waiting more than a second to retrieve it. Both read and
 write timeouts default to 1 second, but may be set lower if your network is
 consistently low-latency.
 
-By default, the cache store will not attempt to reconnect to Redis if the
-connection fails during a request. If you experience frequent disconnects you
-may wish to enable reconnect attempts.
+By default, the cache store will attempt to reconnect to Redis once if the
+connection fails during a request.
 
 Cache reads and writes never raise exceptions; they just return `nil` instead,
 behaving as if there was nothing in the cache. To gauge whether your cache is
@@ -537,10 +536,10 @@ A more complex, production Redis cache store may look something like this:
 cache_servers = %w(redis://cache-01:6379/0 redis://cache-02:6379/0)
 config.cache_store = :redis_cache_store, { url: cache_servers,
 
-  connect_timeout:    30,  # Defaults to 20 seconds
+  connect_timeout:    30,  # Defaults to 1 second
   read_timeout:       0.2, # Defaults to 1 second
   write_timeout:      0.2, # Defaults to 1 second
-  reconnect_attempts: 1,   # Defaults to 0
+  reconnect_attempts: 2,   # Defaults to 1
 
   error_handler: -> (method:, returning:, exception:) {
     # Report errors to Sentry as warnings