d0af5146e0
In commit 49ef150c5d, I stated that the common javadoc task used by all
spring-* modules would be addressed in a separate commit. However,
after further investigation I determined that the spring-test Javadoc
JAR was published successfully, including links to JUnit 5 Javadoc
(which was not previously the case).
https://repo1.maven.org/maven2/org/springframework/spring-test/7.0.0-M4/spring-test-7.0.0-M4-javadoc.jar
This commit therefore only adds a note in JavaConventions to remind us
that the aggregated Javadoc toolchain configuration needs to stay in
sync with the configuration in JavaConventions.
See gh-27497
Closes gh-34774