#1350 Typos in Portuguese translation

[Jakub Wilk]

There are typos in Portuguese translations of "caution" and "chapter". They should read:

<l:gentext key="caution" text="cuidado"/>
<l:gentext key="chapter" text="capítulo"/>

(Note that capitalized version are already correct.)

[Robert Stayton]

I checked in these changes. Thank you for the update.