fix: examples/fabric-contract-example-maven/pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-ORGJETBRAINSKOTLIN-2393744

Author: snyk-bot

examples/fabric-contract-example-maven/pom.xml

@@ -12,7 +12,7 @@
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 
 		<!-- fabric-chaincode-java -->
-		<fabric-chaincode-java.version>2.5.6</fabric-chaincode-java.version>
+		<fabric-chaincode-java.version>2.5.7</fabric-chaincode-java.version>
 
 		<!-- Logging -->
 		<logback.version>1.5.19</logback.version>