Update expressions wiki video (#634)

Author: HelperWesley

docs/gdevelop5/events/expressions/index.md

@@ -23,7 +23,7 @@ These icons indicate that the field accepts an _expression_. An expression is a
 Expressions written in the events sheet are colored to make them easier to read at a glance: numbers, strings, operators, object names, variables and boolean values each use a distinct color. This helps you quickly spot the structure of an expression and catch typos.
 
 <div class="video-container">
-  <iframe src="https://www.youtube.com/embed/JNqekjjendk" frameborder="0" allowfullscreen></iframe>
+  <iframe src="https://www.youtube.com/embed/SPQiJOX73_I?si=hTe52vMJ3dI77Eji" frameborder="0" allowfullscreen></iframe>
 </div>
 
 ## Numbers