update sling engine to 2.15.0
diff --git a/pom.xml b/pom.xml
index d131150..316ffbc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -239,7 +239,7 @@
         <dependency>
             <groupId>org.apache.sling</groupId>
             <artifactId>org.apache.sling.engine</artifactId>
-            <version>2.14.1-SNAPSHOT</version>
+            <version>2.15.0</version>
             <scope>provided</scope>
         </dependency>
         <dependency>