Use correct image variant for next major phpunit.

Closes #3447792

docs/info/common.md

@@ -118,7 +118,12 @@ phpunit (next major):
     - when: manual
 ```
 
+## Test different SQLite versions
+
+The default images ship with SQLite 3.26. If you need SQLite 3.45 you can set the `_TARGET_PHP_IMAGE_VARIANT` to `ubuntu-apache`. Note that this variant is only available for newer versions of PHP. You can check the available PHP images in the [drupalci_environments](https://git.drupalcode.org/project/drupalci_environments/-/tree/dev/php) project.
+
 ## Viewing environment variables
+
 During development or when debugging a job, you may want to view all the environment variables created in the pipeline. To do this, add the following to your .gitlab-ci.yml file
 ```
 variables: