build: removed doubled changelog tag

Author: cuprumtan

packaging/rpm/SPECS/mamonsu.spec

@@ -75,7 +75,6 @@ chown mamonsu.mamonsu /var/log/mamonsu
   - fixed bootstrap -x option: now it checks installed extensions
   - fixed 'pgsql.count_files_to_archive' and 'pgsql.size_files_to_archive' items: now their evaluation depending on type of server (master or replica)
 
-%changelog
 * Mon Aug 16 2021 Alexandra Kuznetsova <a.kuznetsova@postgrespro.ru>  - 3.0.0-1
   - change template name to 'Mamonsu PostgreSQL [PLATFORM]'
   - change metric name 'PostgreSQL transactions: total' to 'PostgreSQL transactions: committed'