fix(curriculum): clarify moon phase day numbering in Daily Coding Challenge 60 (freeCodeCamp#64139)

Co-authored-by: Huyen Nguyen <[email protected]>

Author: VeerendraSD

curriculum/challenges/english/blocks/daily-coding-challenges-javascript/68c497f3aaefc9fd9f1b0e24.md

@@ -22,6 +22,8 @@ After day 28, the cycle repeats with day 1, a new moon.
 - You will not be given any dates before the reference date.
 - Return the correct phase as a string.
 
+**Note:** Day 1 represents the day of the new moon, meaning 0 days have passed since the last new moon.
+
 # --hints--
 
 `moonPhase("2000-01-12")` should return `"New"`.

curriculum/challenges/english/blocks/daily-coding-challenges-python/68c497f3aaefc9fd9f1b0e24.md

@@ -22,6 +22,8 @@ After day 28, the cycle repeats with day 1, a new moon.
 - You will not be given any dates before the reference date.
 - Return the correct phase as a string.
 
+**Note:** Day 1 represents the day of the new moon, meaning 0 days have passed since the last new moon.
+
 # --hints--
 
 `moon_phase("2000-01-12")` should return `"New"`.