update to Apache Sling XSS API 2.2.8
diff --git a/src/main/features/base.json b/src/main/features/base.json
index 7a68ae9..a021588 100644
--- a/src/main/features/base.json
+++ b/src/main/features/base.json
@@ -118,7 +118,7 @@
             "start-order":"20"
         },
         {
-            "id":"org.apache.sling:org.apache.sling.xss:2.2.6",
+            "id":"org.apache.sling:org.apache.sling.xss:2.2.8",
             "start-order":"20"
         },
         {