Outdated oled_task_user code

[bax09]

OLED task function changed to be boolean qmk/qmk_firmware#14864
Yet the keymap is still using "void oled_task_user(void)"
Compiling puts out an error

[Rwarcards762]

Thanks for pointing this out! I haven't recompiled this code in a while so I haven't seen that.

Looking into the QMK docs it's hard to see this change other than via the examples. It looks as though now instead of a void it is a bool that just return False at the end. If you have made those changes and can confirm they work, feel free to open an MR with the fix and I'll test it this weekend.

Otherwise I'll try and get around to testing that the fix works this weekend and commit the change myself.

[Rwarcards762]

Didn't end up getting to it this past weekend -- I'll see about getting to it soon when I get the chance to bring my board home.

[Rwarcards762]

Fixed with merge, thanks @MinXuann :)