Fix Windows path in test

Author: SMadani

src/test/java/com/opentok/OpenTokTest.java

@@ -2856,7 +2856,9 @@ public void testStopCaptions() throws Exception {
     @Test
     public void testVonageShim() throws Exception {
         String appId = UUID.randomUUID().toString();
-        String testResourceDir = Paths.get(getClass().getResource("").toURI()).toString().replace("classes/java", "resources");
+        String testResourceDir = Paths.get(getClass().getResource("").toURI()).toString()
+                .replace("classes\\java", "classes/java")
+                .replace("classes/java", "resources");
         var privateKeyPath = Paths.get(testResourceDir, "application_key");
         OpenTok vonage = new OpenTok(appId, privateKeyPath);
         assertNotNull(vonage);