Use tracnslation_contributors section

blog/content/edition-2/posts/01-freestanding-rust-binary/index.zh-TW.md

@@ -8,7 +8,9 @@ date = 2018-02-10
 # Please update this when updating the translation
 translation_based_on_commit = "24d04e0e39a3395ecdce795bab0963cb6afe1bfd"
 # GitHub usernames of the people that translated this post
-translators = ["wusyong", "gnitoahc"]
+translators = ["wusyong"]
+# GitHub usernames of the people that contributed to this translation
+translation_contributors = ["gnitoahc"]
 +++
 
 建立我們自己的作業系統核心的第一步是建立一個不連結標準函式庫的 Rust 執行檔，這使得無需基礎作業系統即可在[裸機][bare metal]上執行 Rust 程式碼。