Copyright for casacore-data-tai-utc source package in Lunar

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/

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Copyright: 2016 Ole Streicher 
License: BSD-2-Clause
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 1. Redistributions of source code must retain the above copyright notice, this
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 2. Redistributions in binary form must reproduce the above copyright notice,
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