Update dependency com.fasterxml.jackson.core:jackson-databind to v2.21.0

Author: renovate[bot]

conga-sling-plugin/pom.xml

@@ -82,7 +82,7 @@
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-databind</artifactId>
-      <version>2.20.1</version>      
+      <version>2.21.0</version>      
       <scope>compile</scope>
     </dependency>