VCO_AS3340: update waveshaper resistor values

It turns out 10Vp-p is not the same as +/- 10V. Oops.

VCO_AS3340/VCO_AS3340.kicad_pro

@@ -457,6 +457,7 @@
       "single_global_label": "ignore",
       "unannotated": "error",
       "unconnected_wire_endpoint": "warning",
+      "undefined_netclass": "error",
       "unit_value_mismatch": "error",
       "unresolved_variable": "error",
       "wire_dangling": "error"

VCO_AS3340/VCO_AS3340.kicad_sch

@@ -7325,7 +7325,7 @@
 				)
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-		(property "Value" "220k"
+		(property "Value" "47k"
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@@ -7709,7 +7709,7 @@
 				)
 			)
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-		(property "Value" "47k"
+		(property "Value" "22k"
 			(at 214.63 20.32 90)
 			(effects
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@@ -8808,7 +8808,7 @@
 				)
 			)
 		)
-		(property "Value" "300k"
+		(property "Value" "150k"
 			(at 225.425 106.045 90)
 			(effects
 				(font