Changed R9 to 100 kΩ

As it was, it wasted around 85 mW whenever the output was turned on at
20 V.  That's a silly waste of power.  A 100 kΩ pullup works just fine,
so I changed it.  Now there's only 4 mW wasted, so I'm happy.

output.sch

 U 1 1 5892602E
 P 5550 3300
 F 0 "R9" V 5630 3300 50  0000 C CNN
-F 1 "4.7kΩ" V 5550 3300 50  0000 C CNN
+F 1 "100kΩ" V 5550 3300 50  0000 C CNN
 F 2 "Resistors_SMD:R_0805" V 5480 3300 50  0001 C CNN
 F 3 "" H 5550 3300 50  0000 C CNN
 	1    5550 3300

pd-buddy-sink.kicad_pcb

     (fp_text reference R9 (at 2.5 0 180) (layer F.SilkS)
       (effects (font (size 0.8 0.8) (thickness 0.15)))
     )
-    (fp_text value 4.7kΩ (at 0 1.75 180) (layer F.Fab)
+    (fp_text value 100kΩ (at 0 1.75 180) (layer F.Fab)
       (effects (font (size 1 1) (thickness 0.15)))
     )
     (fp_text user %R (at 0 -1.65 180) (layer F.Fab)