Fix a small typo

The sentence "no matter what is the value" is not interrogative. It should be "no matter what the value is".

Author: amirhoseinsalimi

1-js/02-first-steps/15-function-expressions-arrows/article.md

@@ -91,7 +91,7 @@ let sayHi = function() {
 
 The answer is simple:
 - There's no need for `;` at the end of code blocks and syntax structures that use them like `if { ... }`, `for {  }`, `function f { }` etc.
-- A Function Expression is used inside the statement: `let sayHi = ...;`, as a value. It's not a code block, but rather an assignment. The semicolon `;` is recommended at the end of statements, no matter what is the value. So the semicolon here is not related to the Function Expression itself, it just terminates the statement.
+- A Function Expression is used inside the statement: `let sayHi = ...;`, as a value. It's not a code block, but rather an assignment. The semicolon `;` is recommended at the end of statements, no matter what the value is. So the semicolon here is not related to the Function Expression itself, it just terminates the statement.
 ````
 
 ## Callback functions