JCR-5156: webapp: update tomcat dependency to 9.0.106 (#251)

Author: reschke

jackrabbit-webapp/pom.xml

@@ -35,7 +35,7 @@
   <description>Web application that hosts and serves a Jackrabbit content repository</description>
 
   <properties>
-    <tomcat.version>9.0.104</tomcat.version>
+    <tomcat.version>9.0.106</tomcat.version>
   </properties>
 
   <dependencies>