Portuguese translations update from Manuella Silva.

Update to use new (1990) spelling.

See https://github.com/wxWidgets/wxWidgets/pull/5

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76686 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Fix misspellings of "occurred" and "occurrences".

See https://github.com/wxWidgets/wxWidgets/pull/9

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76687 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775