Fix the watchdog path in the client test for windows

Author: ergunsh

tests/telemetry/watchdog-client.test.ts

@@ -63,7 +63,7 @@ describe('WatchdogClient', () => {
     const args = spawnStub.firstCall.args;
     const cmdArgs = args[1];
 
-    assert.match(cmdArgs[0], /watchdog\/main\.js$/);
+    assert.match(cmdArgs[0], /watchdog[/\\]main\.js$/);
     assert.strictEqual(cmdArgs.includes('--parent-pid=100'), true);
     assert.strictEqual(cmdArgs.includes('--app-version=1.2.3'), true);
     assert.strictEqual(cmdArgs.includes('--os-type=2'), true);