Fix typo in README.adoc

[soominsohn]

Hi team,

This PR addresses an issue in the README file related to the usage example of the findByFirstnameLike method in Spring Data JPA.

Before

List<Person> firstNameResults = repository.findByFirstnameLike("Oli*");

After

List<Person> firstNameResults = repository.findByFirstnameLike("Oli%");

Using an asterisk (*) in the LIKE clause does not work for pattern matching in SQL. The proper wildcard character for the LIKE clause in SQL is the percentage symbol (%).

Thank you.

[christophstrobl]

good catch - thank you!

[schauder]

Thanks. That's merged.