Fix syntax error

Author: colebemis

src/rules/no-system-props.js

@@ -14,7 +14,7 @@ const utilityComponents = new Set(['Box', 'Text'])
 const excludedComponentProps = new Map([
   ['AnchoredOverlay', new Set(['width', 'height'])],
   ['Dialog', new Set(['width', 'height'])],
-  ['PageLayout', new Set(['padding'])]
+  ['PageLayout', new Set(['padding'])],
   ['ProgressBar', new Set(['bg'])],
   ['PointerBox', new Set(['bg'])]
 ])