git: openjdk/jdk: 8300909: Update com/sun/jndi/dns/Test6991580.java manual test instruction

[Bill Huang]

Changeset: 09bfbf80
Author:    Bill Huang <bhuang at openjdk.org>
Date:      2023-01-31 22:12:07 +0000
URL:       https://git.openjdk.org/jdk/commit/09bfbf80639f059563fcd4432995b8c380cea298

8300909: Update com/sun/jndi/dns/Test6991580.java manual test instruction

Reviewed-by: alanb

! test/jdk/com/sun/jndi/dns/Test6991580.java