Update JsonExtensionsTests.cs

Author: aritchie

test/Sentry.Tests/Platforms/Android/JsonExtensionsTests.cs

@@ -98,7 +98,7 @@ private static void AssertEqual(SentryEvent managed, JavaSdk.SentryEvent native)
         native.Release.Should().Be(managed.Release, "Release");
         native.Environment.Should().Be(managed.Environment, "Environment");
         native.Transaction.Should().Be(managed.TransactionName!, "Transaction");
-        native.Level!.ToString().ToUpper().Should().Be(managed.Level.ToUpper().ToString(), "Level");
+        native.Level!.ToString().ToUpper().Should().Be(managed.Level!.ToString()!.ToUpper(), "Level");
         native.Throwable.Message.Should().Be(managed.Exception!.Message, "Message should match");
 
         // extras