fix(curriculum): improve explanation of A1 Chinese greetings and introductions (freeCodeCamp#64752)

Author: estefaniacn

curriculum/challenges/english/blocks/zh-a1-learn-understanding-greetings-and-introductions/68ef8ef35b26ef1fd797d55f.md

@@ -60,7 +60,8 @@ Teacher is a profession, not a nationality.
 
 `我是中国人 (wǒ shì zhōng guó rén)` uses the structure `我是 (wǒ shì)` + nationality to state where someone is from.
 
-`我是 (wǒ shì)` means "I am...". A nationality is formed by adding `人 (rén)` meaning "person" to the country name.
+`我是 (wǒ shì)` means "I am...". A nationality is formed by adding `人 (rén)`, meaning "person", to the country name.
+
 `中国 (zhōng guó)` means "China", so `中国人 (zhōng guó rén)` means a person from China.
 
 Therefore, Wang Hua is saying she is Chinese.