Add Gikun note

content/challenges/67.md

@@ -93,7 +93,7 @@ japanese:
 date: 2022-06-21
 ---
 
-**Note:** In these lyrics, 「[時]{とき}」is written as 「一瞬」(normally 「[いっしゅん](https://jisho.org/word/一瞬)」). This is to add more nuance to the lyrics.
+**Note:** In these lyrics, 「[時]{とき}」is written as 「一瞬」(normally 「[いっしゅん](https://jisho.org/word/一瞬)」). This is to add more nuance to the lyrics and is called [[義]{ぎ}[訓]{くん}](https://morg.systems/Gikun).
 
 This week's challenge is from *First Magnitude Star*'s lyrics ([YouTube](https://www.youtube.com/watch?v=UU6y-fGTPsM)):