Update introduction.md (#2479)

Previously, the comment implied that the loop executes only when the condition is true,
which is misleading for a do-while loop.

Updated the comment to clearly reflect that the loop body executes at least once
before the condition (x > 10) is evaluated, and continues only if the condition remains true.

This improves readability and helps avoid confusion between while and do-while behavior.

Author: semizemes

concepts/do-while-loops/introduction.md

@@ -7,7 +7,7 @@ int x = 23;
 
 do
 {
-    // Execute logic if x > 10
+    // Always executes at least once, then repeats as long as x > 10
     x = x - 2;
 } while (x > 10)
 ```