docs: fix readme to prevent misreading (#118)

Author: supercaracal

README.md

@@ -53,15 +53,14 @@ RedisClient.cluster(nodes: %w[redis://node1:6379 redis://node2:6379]).new_client
 ```ruby
 # To connect with a subset of auth-needed nodes for startup
 
-# User name and password should be URI encoded and the same in every node.
+## with URL:
+### User name and password should be URI encoded and the same in every node.
 username = 'myuser'
 password = URI.encode_www_form_component('!&<123-abc>')
-
-# with URL:
 RedisClient.cluster(nodes: %W[redis://#{username}:#{password}@node1:6379 redis://#{username}:#{password}@node2:6379]).new_client
 
-# with options:
-RedisClient.cluster(nodes: %w[redis://node1:6379 redis://node2:6379], username: username, password: password).new_client
+## with options:
+RedisClient.cluster(nodes: %w[redis://node1:6379 redis://node2:6379], username: 'myuser', password: '!&<123-abc>').new_client
 ```
 
 ```ruby