Add missing character 疱

[ChiahongHong]

The word list originally included only 皰. Since 疱 is also a common form, this PR adds it to the list.

教育部重編國語辭典修訂本：

• 疱 https://dict.revised.moe.edu.tw/dictView.jsp?ID=690
• 疱疹 https://dict.revised.moe.edu.tw/dictView.jsp?ID=23512
• 膿疱 https://dict.revised.moe.edu.tw/dictView.jsp?ID=58712
• 水疱 https://dict.revised.moe.edu.tw/dictView.jsp?ID=134137