Logo configuration for pt.wiktionary

Old logo URL ... //upload.wikimedia.org/wikipedia/commons/thumb/3/36/WiktionaryPt.png/135px-WiktionaryPt.png
New logo URL ... //upload.wikimedia.org/wikipedia/commons/thumb/c/cc/WiktionaryPt.svg/128px-WiktionaryPt.svg.png

This is a follow-up of change Ic3ec602d8a5fcabfd5a92b8ede6c690d9869a01e.

Bug: 53685
Change-Id: I475536a536c94453b8cf3ac83f2d33ce0ba1a4ee