Update README.md

Add Latvian language

README.md

@@ -792,6 +792,7 @@ Currently, this card contains translations for following languages:
 * `hu` - Hungarian (Magyar)
 * `is` - Icelandic (Íslenska)
 * `it` - Italian (Italiano)
+* `lv` - Latvian (Latviešu)
 * `nb-NO` - Norwegian Bokmål (Norsk bokmål)
 * `nl` - Dutch (Nederlands)
 * `pl` - Polish (Polski)
@@ -902,4 +903,4 @@ If you want to support my work with a donation you can use one of the following
 [revolut_me_shield]: https://img.shields.io/static/v1.svg?label=%20&message=Revolut&logo=revolut
 
 [revolut_me]: https://revolut.me/314ma
-<!-- piotrmachowski_support_links_end -->
+<!-- piotrmachowski_support_links_end -->