l10n: README: add file extention ".md"

Add file extension ".md" to "po/README" to help to display this markdown
file properly.

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
This commit is contained in:
Jiang Xin 2021-05-26 17:38:56 +08:00
parent 3d33e36c47
commit e54b271529