Update tinker_board_2.md

Author: asus-leslieyu

docs/developer-guide/tinker_board_2.md

@@ -1,5 +1,5 @@
 ---
-sidebar_position: 1
+sidebar_position: 2
 ---
 
 # Tinker Board 2/2S
@@ -23,4 +23,4 @@ To build the image, please run the following commands.
 source build/envsetup.sh
 lunch Tinker_Board_2-userdebug
 ./build.sh -UCKAu
-```
+```