Fix typo in README

This pull request fixes a small typo in the README file:

- `datatabase` → `database`

It's a minor change, but helps improve the clarity and quality of the documentation.

Signed-off-by: shchae04 <94516539+shchae04@users.noreply.github.com>

Original pull request #3953

Author: shchae04

README.adoc

@@ -143,7 +143,7 @@ https://github.com/spring-projects/spring-data-jpa/issues[issue tracker] to see
 * If the issue doesn’t exist already, https://github.com/spring-projects/spring-data-jpa/issues[create a new issue].
 * Please provide as much information as possible with the issue report, we like to know the version of Spring Data that you are using and JVM version, complete stack traces and any relevant configuration information.
 * If you need to paste code, or include a stack trace format it as code using triple backtick.
-* If possible try to create a test-case or project that replicates the issue. Attach a link to your code or a compressed file containing your code. Use an in-memory datatabase if possible or set the database up using https://github.com/testcontainers[Testcontainers].
+* If possible try to create a test-case or project that replicates the issue. Attach a link to your code or a compressed file containing your code. Use an in-memory database if possible or set the database up using https://github.com/testcontainers[Testcontainers].
 
 == Building from Source