Use Java config code snippets in transaction management section

[abccbaandy]

Many example in the reference still use xml format, but most project doesn't use xml any more.

Can it update to java config?

For ex:
Transaction Management
https://docs.spring.io/spring-framework/reference/data-access/transaction.html

[sbrannen]

Related Issues

• Refactor configuration code samples to be more relevant for modern Spring applications #22171
• Revise "The IoC Container" section to be more relevant for modern Spring applications #32429
• Introduce configuration code includes and tabs in the Integration section #32600

[abccbaandy]

Great to see the reference is keeping update, hope to see the Transaction Management part soon :)