YAML sync: add ru_by (89 configs)

README.md

@@ -428,6 +428,12 @@ configs:
         path: data/ro_ro/test-*.parquet
       - split: train
         path: data/ro_ro/train-*.parquet
+  - config_name: ru_by
+    data_files:
+      - split: test
+        path: data/ru_by/test-*.parquet
+      - split: train
+        path: data/ru_by/train-*.parquet
   - config_name: ru_ru
     data_files:
       - split: test