
Restore `spring-boot-maven-plugin` dependency in `maven-shade-plugin` starter configuration. Required so that the shade plugin can use `PropertiesMergingResourceTransformer` if wanted. Fixes gh-11200
Restore `spring-boot-maven-plugin` dependency in `maven-shade-plugin` starter configuration. Required so that the shade plugin can use `PropertiesMergingResourceTransformer` if wanted. Fixes gh-11200