Broken @link in Javadocs

[DaveCTurner]

https://elasticsearch-ci.elastic.co/job/elastic+elasticsearch+master+matrix-java-periodic/ES_BUILD_JAVA=java11,ES_RUNTIME_JAVA=java11,nodes=virtual&&linux/212/console failed with a compile error due to something wrong in a Javadoc comment introduced in #32356

I pushed these to suppress this issue for now, but am opening this issue to fix it properly.

dd939eb (6.x)
621350c (master)

@astefan could you have a look?

[elasticmachine]

Pinging @elastic/es-search-aggs

[astefan]

Yep, I have it. Thanks @DaveCTurner