Change cosmosclient to private and add new line by end of file

Author: brucezlata

src/providers/WorkflowCore.Providers.Azure/Interface/ICosmosDbClient.cs

@@ -6,4 +6,4 @@ public interface ICosmosDbClient
     {
         CosmosClient GetCosmosClient();
     }
-}
+}

src/providers/WorkflowCore.Providers.Azure/Services/CosmosDbClient.cs

@@ -8,7 +8,7 @@ public class CosmosDbClient : ICosmosDbClient, IDisposable
     {
         private bool isDisposed = false;
 
-        public CosmosClient _client;
+        private CosmosClient _client;
 
         public CosmosDbClient(string connectionString)
         {
@@ -45,4 +45,4 @@ protected virtual void Dispose(bool disposing)
             }
         }
     }
-}
+}