typo (#1052)

Co-authored-by: David Grudl <[email protected]>

Author: buffus

nette/cs/introduction-to-object-oriented-programming.texy

@@ -158,7 +158,7 @@ class Osoba
 
 	function vypisInformace()
 	{
-		echo "Věk: {$this->age} let\n";
+		echo "Věk: {$this->vek} let\n";
 	}
 }