[Docs] OLED documentation edits (qmk#15977)

* Clarify OLED_TIMEOUT

* Add a section on logo file location

docs/feature_oled_driver.md

@@ -84,6 +84,8 @@ static void render_logo(void) {
 }
 ```
 
+?> The default font file is located at `drivers/oled/glcdfont.c` and its location can be overwritten with the `OLED_FONT_H` configuration option. Font file content can be edited with external tools such as [Helix Font Editor](https://helixfonteditor.netlify.app/) and [Logo Editor](https://joric.github.io/qle/).
+
 ## Buffer Read Example
 For some purposes, you may need to read the current state of the OLED display
 buffer. The `oled_read_raw` function can be used to safely read bytes from the
@@ -162,7 +164,7 @@ These configuration options should be placed in `config.h`. Example:
 |`OLED_FONT_END`            |`223`            |The ending character index for custom fonts                                                                               |
 |`OLED_FONT_WIDTH`          |`6`              |The font width                                                                                                            |
 |`OLED_FONT_HEIGHT`         |`8`              |The font height (untested)                                                                                                |
-|`OLED_TIMEOUT`             |`60000`          |Turns off the OLED screen after 60000ms of keyboard inactivity. Helps reduce OLED Burn-in. Set to 0 to disable.           |
+|`OLED_TIMEOUT`             |`60000`          |Turns off the OLED screen after 60000ms of screen update inactivity. Helps reduce OLED Burn-in. Set to 0 to disable.      |
 |`OLED_FADE_OUT`            |*Not defined*    |Enables fade out animation. Use together with `OLED_TIMEOUT`.                                                             |
 |`OLED_FADE_OUT_INTERVAL`   |`0`              |The speed of fade out animation, from 0 to 15. Larger values are slower.                                                  |
 |`OLED_SCROLL_TIMEOUT`      |`0`              |Scrolls the OLED screen after 0ms of OLED inactivity. Helps reduce OLED Burn-in. Set to 0 to disable.                     |