add 'info_config.h' into docs/hardware_keyboard_guidelines.md (#16247)

Added info_config.h added in #10817 to the include order description of config.h.

docs/data_driven_config.md

@@ -74,7 +74,7 @@ Whenever QMK generates a complete `info.json` it extracts information from `conf
 
 If you are not sure how to edit this file or are not comfortable with Python [open an issue](https://github.com/qmk/qmk_firmware/issues/new?assignees=&labels=cli%2C+python&template=other_issues.md&title=) or [join #cli on Discord](https://discord.gg/heQPAgy) and someone can help you with this part.
 
-### Add code to generate it
+### Add code to generate it :id=add-code-to-generate-it
 
 The final piece of the puzzle is providing your new option to the build system. This is done by generating two files:
 

docs/hardware_keyboard_guidelines.md

@@ -87,6 +87,7 @@ The `config.h` files can also be placed in sub-folders, and the order in which t
     * `keyboards/top_folder/sub_1/sub_2/config.h`
       * `keyboards/top_folder/sub_1/sub_2/sub_3/config.h`
         * `keyboards/top_folder/sub_1/sub_2/sub_3/sub_4/config.h`
+          * [`.build/objs_<keyboard>/src/info_config.h`](data_driven_config.md#add-code-to-generate-it) see [Data Driven Configuration](data_driven_config.md)
           * `users/a_user_folder/config.h`
           * `keyboards/top_folder/keymaps/a_keymap/config.h`
         * `keyboards/top_folder/sub_1/sub_2/sub_3/sub_4/post_config.h`