Decrease the brightness of LEDs

Replace 365R with 1k. The original was just too bright, especially since
the LEDs serve only as a simple on/off indicator. With the new value,
they should not little less bright but still good enough even on sun.

Signed-off-by: Petr Horacek <hrck@protonmail.com>

Author: phoracek

CHANGELOG.md

@@ -17,6 +17,7 @@ backwards compatibility.
 * Improve the amplitude balance between low and high number of voices.
 * Fix a bug where uninitialized voices would cause bit noise.
 * Send solo output to SOLO' jack, as written in the documentation.
+* Decrease the brightness of LEDs.
 
 ## 1.1.0