docs: update readme

README.md

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 # Sbmt-Outbox
 
-<img src="https://raw.githubusercontent.com/SberMarket-Tech/sbmt-outbox/master/.github/outbox-logo.png" alt="sbmt-outbox logo" height="180" align="right" />
+<img src="https://raw.githubusercontent.com/SberMarket-Tech/sbmt-outbox/master/.github/outbox-logo.png" alt="sbmt-outbox logo" height="220" align="right" />
 
 Microservices often publish messages after a transaction has been committed. Writing to the database and publishing a message are two separate transactions, so they must be atomic. A failed publication of a message could lead to a critical failure of the business process.
 
 The Outbox pattern provides a reliable solution for message publishing. The idea behind this approach is to have an "outgoing message table" in the service's database. Before the main transaction completes, a new message row is added to this table. As a result, two actions take place as part of a single transaction. An asynchronous process retrieves new rows from the database table and, if they exist, publishes the messages to the broker.
 
-Read more about the Outbox pattern at https://microservices.io/patterns/data/transactional-outbox.html
-
 ## Installation
 
 Add this line to your application's Gemfile: