dict: add appropriatness->appropriateness

Google search shows 41,000 results for appropriatness, that's 0.34%
of the results shown for appropriateness (11,900,000).

Author: neuschaefer

data/dictionary.txt

@@ -337,6 +337,7 @@ appropiate->appropriate
 appropiately->appropriately
 appropraite->appropriate
 appropraitely->appropriately
+appropriatness->appropriateness
 appropropiate->appropriate
 appropropiately->appropriately
 approproximate->approximate