fix(curriculum): improve code examples in greeting bot workshop (#59763)

Co-authored-by: Huyen Nguyen <25715018+huyenltnguyen@users.noreply.github.com>

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

@@ -14,7 +14,7 @@ In the lecture videos, you learned how to work with string concatenation using t
 ```js
 let firstName = "John";
 
-"Hello, my name is " + firstName + ".";
+console.log("Hello, my name is " + firstName + ".");
 // result: "Hello, my name is John."
 ```
 

curriculum/challenges/english/25-front-end-development/workshop-greeting-bot/66adbc8a9793d64250f7e609.md

@@ -10,11 +10,11 @@ dashedName: step-9
 In the previous lecture videos, you learned how to reassign values to variables like this:
 
 ```js
-// name holds the value "John"
 let name = "John";
+console.log(name); // "John"
 
-// name now holds the value "Jane"
 name = "Jane";
+console.log(name); // "Jane"
 ```
 
 Using reassignment, assign the string `"professorBot"` to the `bot` variable.