fix doc sidebar error

Author: Neutree

docs/doc/en/sidebar.yaml

@@ -34,7 +34,7 @@ items:
         label: Camera uses
     -   file: vision/image_ops.md
         label: Image control
-    -   file: vision/touchsreen.md
+    -   file: vision/touchscreen.md
         label: Touch screen
     -   file: vision/find_blobs.md
         label: Finding color blocks

docs/doc/zh/sidebar.yaml

@@ -34,7 +34,7 @@ items:
         label: 摄像头使用
     -   file: vision/image_ops.md
         label: 基本图像操作
-    -   file: vision/touchsreen.md
+    -   file: vision/touchscreen.md
         label: 触摸屏使用
     -   file: vision/find_blobs.md
         label: 寻找色块