SLING-8473 Provide Sling CMS features

uncomment CMS features
diff --git a/pom.xml b/pom.xml
index b978fd2..505b940 100644
--- a/pom.xml
+++ b/pom.xml
@@ -165,11 +165,9 @@
             <!-- Apache Tika -->
             <feature>tika</feature>
             <!-- Apache Sling Applications and Samples -->
-            <!--
             <feature>sling-cms</feature>
             <feature>sling-cms-login</feature>
             <feature>sling-cms-reference</feature>
-            -->
             <!-- Composum -->
             <feature>composum-nodes</feature>
             <!-- Thymeleaf -->