LibreOffice Native Language Projects in 2020 (from Annual Report)

Hi everyone,

I've put the Annual Report section about native language projects on the
blog:

https://blog.documentfoundation.org/blog/2021/05/11/libreoffice-native-language-projects-in-2020/

Many thanks to everyone in the localisation project who helped out last
year. Despite the difficulties with the pandemic, we achieved many
awesome things together. Cheers!