Change copyright year in file header

Author: psx95

exporters/trace/src/main/java/com/google/cloud/opentelemetry/trace/InternalTraceExporter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Google
+ * Copyright 2023 Google
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,8 +15,6 @@
  */
 package com.google.cloud.opentelemetry.trace;
 
-import static com.google.api.client.util.Preconditions.checkNotNull;
-
 import com.google.api.gax.core.FixedCredentialsProvider;
 import com.google.api.gax.core.NoCredentialsProvider;
 import com.google.api.gax.grpc.GrpcTransportChannel;
@@ -35,12 +33,15 @@
 import io.opentelemetry.sdk.common.CompletableResultCode;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import io.opentelemetry.sdk.trace.export.SpanExporter;
+
+import javax.annotation.Nonnull;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
 import java.util.Map;
-import javax.annotation.Nonnull;
+
+import static com.google.api.client.util.Preconditions.checkNotNull;
 
 class InternalTraceExporter implements SpanExporter {