fix(curriculum): clarify pronunciation wording in Chinese glossary (freeCodeCamp#64747)

Author: kiruthikadev-r

curriculum/challenges/english/blocks/zh-a1-review-introduction-questions/69183626c350253a6a4a05e1.md

@@ -58,7 +58,7 @@ There's also a summary of important Pinyin rules involved in this module.
 
 When `不 (bù)` is followed by a syllable in the first, second, or third tone, it remains in the fourth tone. However, when `不 (bù)` is followed by a syllable in the fourth tone, it changes to the second tone. For example:
 
-`不是 (bù shì)` pronounced as `bú shì`
+`不是 (bù shì)` is pronounced as `bú shì`.
 
 # --assignment--