fix(deps): update dependency io.namastack:namastack-outbox-starter-jdbc to v1.6.0

Author: renovate[bot]

gradle.properties

@@ -18,5 +18,5 @@ springdocVersion=2.8.6
 spotlessVersion=7.0.2
 jibVersion=3.5.3
 web3jVersion=4.14.0
-namastackVersion=1.1.0
+namastackVersion=1.6.0
 logstashLogbackVersion=9.0