SLING-10570 Update to Sling (Bundle) Parent 44

add missing project.build.outputTimestamp
diff --git a/pom.xml b/pom.xml
index 704e8a5..586a1b5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -35,6 +35,10 @@
   <name>Apache Sling - Karaf Distribution</name>
   <description>Apache Sling Karaf Distribution</description>
 
+  <properties>
+    <project.build.outputTimestamp>1970-01-01T00:00:00Z</project.build.outputTimestamp>
+  </properties>
+
   <scm>
     <connection>scm:git:https://gitbox.apache.org/repos/asf/sling-org-apache-sling-karaf-distribution.git</connection>
     <developerConnection>scm:git:https://gitbox.apache.org/repos/asf/sling-org-apache-sling-karaf-distribution.git</developerConnection>