Announcement text for premium releases needs to be changed

Proposed text:

   OpenSSL version 1.0.2zh released
   ================================

   OpenSSL - The Open Source toolkit for SSL/TLS
   https://www.openssl.org/

   The OpenSSL project team is pleased to announce the release of
   version 1.0.2zh of our open source toolkit for SSL/TLS.

   OpenSSL 1.0.2zh is available for download via HTTPS from the following
   location on our support system:

   https://github.openssl.org/openssl/extended-releases/releases/tag/OpenSSL_1_0_2zh

   If you have not yet established access to our support system server,
   please contact us on osf-contact@openssl.org to arrange your set up.

   The distribution file name is:

    o openssl-1.0.2zh.tar.gz
      Size: xxxxxxx
      SHA1 checksum:  xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
      SHA256 checksum:  xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

   The checksums were calculated using the following commands:

    openssl sha1 openssl-1.0.2zh.tar.gz
    openssl sha256 openssl-1.0.2zh.tar.gz

   Yours,

   The OpenSSL Project Team.

The proposed announcement text is in issue #157; start by locating the premium-release announcement template or generation entry point in the tools repository. Update it to match the supplied wording and verify that the resulting announcement preserves the shown links, filename, checksums, and formatting.