[SITE-IMPROVEMENT] Issue need to confirm about the API web

[xiong duan]

After checking the regenerate the Web, I noticed a small problem with the
Calcite API URI https://calcite.apache.org/javadocAggregate/ . The doc
title should be "Apache Calcite API", but is "Apache Calcite calcite API".
Same as Avatica, The doc title should be " Apache Calcite Avatica API", but
is "Apache Calcite Avatica calcite-avatica API". I think this is a problem.
Do you think so?