GUACAMOLE-1794: Update KSM SDK to 16.5.3 to add support for "passkey" field type.

(cherry picked from commit 2a9bbed2250be2087db8d4a276ff4140ac919888)

extensions/guacamole-vault/modules/guacamole-vault-ksm/pom.xml

@@ -60,7 +60,7 @@
         <dependency>
             <groupId>com.keepersecurity.secrets-manager</groupId>
             <artifactId>core</artifactId>
-            <version>16.5.2</version>
+            <version>16.5.3</version>
 
             <!-- Correct version conflict (different versions across transitive
                 dependencies) -->