Add same punctuation to fix the analyzer warning

Terminal.Gui/Resources/Strings.pt-PT.resx

@@ -166,7 +166,7 @@
     <value>Acabam_ento</value>
   </data>
   <data name="wzNext" xml:space="preserve">
-    <value>S_eguir</value>
+    <value>S_eguir...</value>
   </data>
   <data name="btnSaveAs" xml:space="preserve">
     <value>Guardar como</value>