Fix semicolon

Author: Hardvan

src/test/java/com/thealgorithms/scheduling/NonPreemptivePrioritySchedulingTest.java

@@ -23,7 +23,7 @@ public void testCalculateAverageWaitingTime() {
 
         NonPreemptivePriorityScheduling.Process[] executionOrder = NonPreemptivePriorityScheduling.scheduleProcesses(processes);
 
-        double expectedAvgWaitingTime = 6.666666666666667
+        double expectedAvgWaitingTime = 6.666666666666667;
         double actualAvgWaitingTime = NonPreemptivePriorityScheduling.calculateAverageWaitingTime(processes, executionOrder);
 
         assertEquals(expectedAvgWaitingTime, actualAvgWaitingTime, 0.01, "Average waiting time should be calculated correctly.");