Update app.py

Make headers Russian-language

app.py

@@ -25,15 +25,15 @@ To create a new dashboard, you need several environment variables, that you can
 """
 
 # Translation of legends and titles
-ANNOTATED = 'Annotations'
-NUMBER_ANNOTATED = 'Total Annotations'
-PENDING = 'Pending'
+ANNOTATED = 'Аннотации'
+NUMBER_ANNOTATED = 'Всего аннотаций'
+PENDING = 'Незавершенный аннотации'
 
-NUMBER_ANNOTATORS = "Number of annotators"
-NAME = 'Username'
-NUMBER_ANNOTATIONS = 'Number of annotations'
+NUMBER_ANNOTATORS = "Количество аннотаторов"
+NAME = 'Имя пользователя'
+NUMBER_ANNOTATIONS = 'Количество аннотаций'
 
-CATEGORY = 'Category'
+CATEGORY = 'Категория'
 
 def obtain_source_target_datasets() -> (
     Tuple[