chore(file_explorer): use the correct example path
Simple File Explorer
"""""""""""""""""""""""""
-.. lv_example:: others/ime/lv_example_file_explorer_1
+.. lv_example:: others/file_explorer/lv_example_file_explorer_1
:language: c
Control File Explorer
"""""""""""""""""""""""""
-.. lv_example:: others/ime/lv_example_file_explorer_2
+.. lv_example:: others/file_explorer/lv_example_file_explorer_2
:language: c
Custom sort
"""""""""""""""""""""""""
-.. lv_example:: others/ime/lv_example_file_explorer_3
+.. lv_example:: others/file_explorer/lv_example_file_explorer_3
:language: c
