fix(curriculum): clarify greeting bot hint (freeCodeCamp#61758)

Author: collinfugate

curriculum/challenges/english/25-front-end-development/workshop-greeting-bot/66ada3f46945763dd97f43f8.md

@@ -42,7 +42,7 @@ Your `botIntroduction` variable should hold the value of a string.
 assert.isString(botIntroduction);
 ```
 
-You should use string concatenation with the `+` operator to join the string `"My name is "` with the `bot` variable followed by a period (`.`). Be mindful of spaces.
+You should use string concatenation with the `+` operator to join the string `"My name is "` with the `bot` variable followed by a period (`.`). Be mindful of spaces. Assign this concatenated string to the `botIntroduction` variable.
 
 ```js
 assert.equal(botIntroduction, "My name is teacherBot.");