chore: fix a bug in existing test

The `testRemoveUpdateTokenWithSuccessfulRequest` should use `OSRequestRemoveUpdateToken` instead of `OSRequestRemoveStartToken`, fix small bug.

Author: nan-li

iOS_SDK/OneSignalSDK/OneSignalLiveActivitiesTests/OSLiveActivitiesExecutorTests.swift

@@ -138,7 +138,7 @@ final class OSLiveActivitiesExecutorTests: XCTestCase {
         OneSignalCoreMocks.waitForBackgroundThreads(seconds: 0.2)
         mockClient.reset()
 
-        let request = OSRequestRemoveStartToken(key: "my-activity-id")
+        let request = OSRequestRemoveUpdateToken(key: "my-activity-id")
         mockClient.setMockResponseForRequest(request: String(describing: request), response: [String: Any]())
 
         /* When */