add language tags to YAML, so this resource is more easily discovered

fixed my previous Pull Request with this pull request, just fixing the language tags.

README.md

@@ -1,5 +1,8 @@
 ---
-language: id
+language: 
+- id
+- jv
+- sun
 datasets:
 - mozilla-foundation/common_voice_7_0
 - openslr