Add support for European Portuguese variant (#1619)

library/src/meta/heading.rs

@@ -224,6 +224,7 @@ impl LocalName for HeadingElem {
             Lang::ITALIAN => "Sezione",
             Lang::NYNORSK => "Kapittel",
             Lang::POLISH => "Sekcja",
+            Lang::PORTUGUESE if option_eq(region, "PT") => "Secção",
             Lang::PORTUGUESE => "Seção",
             Lang::RUSSIAN => "Раздел",
             Lang::SLOVENIAN => "Poglavje",

library/src/meta/outline.rs

@@ -273,6 +273,7 @@ impl LocalName for OutlineElem {
             Lang::ITALIAN => "Indice",
             Lang::NYNORSK => "Innhald",
             Lang::POLISH => "Spis treści",
+            Lang::PORTUGUESE if option_eq(region, "PT") => "Índice",
             Lang::PORTUGUESE => "Sumário",
             Lang::RUSSIAN => "Содержание",
             Lang::SLOVENIAN => "Kazalo",