Adds two known issues to the 8.0.0-rc1 release notes:
* A general advisory not to upgrade production clusters to 8.0.0-rc1. The advisory also notes that upgrades from 8.0.0-rc1 are not supported.
* A note indicating that the SQL JDBC driver requires Java 17 or newer. This requirement will be changed to Java 1.8
or newer in 8.0.0-rc2.
(cherry picked from commit 31cba4fa16)