process: Add the correct license header.

Author: amanda-tarafa

apis/Google.Cloud.Diagnostics.Common/Google.Cloud.Diagnostics.Common/Logging/LoggingOptions.cs

@@ -4,7 +4,7 @@
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 // 
-//   https://www.apache.org/licenses/LICENSE-2.0
+//     https://www.apache.org/licenses/LICENSE-2.0
 // 
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,