data: Fix typo in working-memory.md

Updated comment to reflect actual content in code.

Signed-off-by: Tache Robert Andrei <tacheandu@gmail.com>

Author: MekalBoy

content/data/lab/content/working-memory.md

@@ -15,7 +15,7 @@ From a programmer's perspective, this looks pretty straightforward:
 int main(void)
 {
 	int a;               // declare variable
-	a = 42;              // write 7 to variable a
+	a = 42;              // write 42 to variable a
 	printf("%d\n", a);   // read variable a and print its contents
 
 	return 0;