Fix index links

Author: goshander

en/datalens/index.yaml

@@ -6,10 +6,10 @@ meta:
 links:
   - title: Getting started
     description: Getting started with DataLens
-    href: quickstart
+    href: quickstart.html
   - title: Connections
     description: Connect to various data sources
-    href: concepts/connection
+    href: concepts/connection.html
   - title: Datasets
     description: Describe the structure of the data you got from the source
     href: dataset/
@@ -18,7 +18,7 @@ links:
     href: concepts/chart/
   - title: Dashboards
     description: Build your charts on a single page
-    href: concepts/dashboard
+    href: concepts/dashboard.html
   - title: Quotas and limits
     description: Technical and organizational restrictions
-    href: concepts/limits
+    href: concepts/limits.html

ru/datalens/index.yaml

@@ -6,10 +6,10 @@ meta:
 links:
   - title: Начало работы
     description: Как начать работать с DataLens
-    href: quickstart
+    href: quickstart.html
   - title: Подключения
     description: Подключитесь к различным источникам данных
-    href: concepts/connection
+    href: concepts/connection.html
   - title: Датасеты
     description: Опишите структуру данных, полученных из источника
     href: dataset/
@@ -18,7 +18,7 @@ links:
     href: concepts/chart/
   - title: Дашборды
     description: Соберите свои чарты на одной странице
-    href: concepts/dashboard
+    href: concepts/dashboard.html
   - title: Квоты и лимиты
     description: Технические и организационные ограничения сервиса
-    href: concepts/limits
+    href: concepts/limits.html