docs: Fixing badly-formatted doc comment

The Javadoc specification doesn't actually define a {@more}
tag. The Java-reference engine interpreted it as a paragraph
break, but the Kotlin doc engine (more properly) passed the
tag through verbatim.

Replaced it with a <p> to make it a paragraph break in both
languages.

Bug: 247563816
Test: (docs build)
Change-Id: Ib7bb4c2628141b7479c338f1d3fb28da503b847f