Minor fixes on examples

Hello there!

I have two small fixes for today, both appointed by the community:

• On page 20, the Flair Check example was wrong. Both dice results should count for the total amount of armor gained, so now the example reflects that ("Armor 5" is the correct result)
  
• On page 40, there is a mention of Duration as a mechanic. This mechanic was replaced by Charge on version 1.1, but the example retained the old terminology. This has now been fixed.

Both the PDF and the print on demand version have been updated to reflect those changes.

Thank you very much!

-- Cezar