fix confusing typo in COPYING file
fix confusing typo in COPYING file

thanks to Mahaveer Darade for alerting me

janmejay/liblognorm,aturetta/liblognorm,janmejay/liblognorm,aturetta/liblognorm,radu-gheorghe/liblognorm,radu-gheorghe/liblognorm,aturetta/liblognorm