[site] Update site xsd

Author: hazendaz

src/site/site.xml

@@ -16,8 +16,8 @@
        limitations under the License.
 
 -->
-<project xmlns="http://maven.apache.org/DECORATION/1.7.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-  xsi:schemaLocation="http://maven.apache.org/DECORATION/1.7.0 http://maven.apache.org/xsd/decoration-1.7.0.xsd"
+<project xmlns="http://maven.apache.org/DECORATION/1.8.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/DECORATION/1.8.0 http://maven.apache.org/xsd/decoration-1.8.0.xsd"
   name="MyBatis Dynamic SQL">
 
   <bannerLeft>