Use using declaration for paramsCmd (#4010)

Author: SimonCropp

src/Microsoft.Data.SqlClient/src/Microsoft/Data/SqlClient/SqlCommand.cs

@@ -1350,7 +1350,7 @@ internal void DeriveParameters()
                 useManagedDataType = false;
             }
 
-            SqlCommand paramsCmd = new SqlCommand(cmdText.ToString(), Connection, Transaction)
+            using SqlCommand paramsCmd = new SqlCommand(cmdText.ToString(), Connection, Transaction)
             {
                 CommandType = CommandType.StoredProcedure
             };