updated add column example config (#197)

Author: FrisoDenijs

README.md

@@ -544,12 +544,12 @@ Keys and values are case-sensitive. Case must match **_exactly_** as shown below
         <remove Name="Properties"/>
     </RemoveStandardColumns>
     <Columns>
-      <add ColumnName="EventType" DataType="int"/>
-      <add ColumnName="Release"
-           DataType="varchar"
-           DataLength="64"
-           AllowNull="true"
-           NonClusteredIndex="false"/>
+      <add columnName="EventType" DataType="int"/>
+      <add columnName="Release"
+           dataType="varchar"
+           dataLength="64"
+           allowNull="true"
+           nonClusteredIndex="false"/>
     </Columns>
     <Exception ColumnName="Ex" DataLength="512"/>
     <Id NonClusteredIndex="true"/>