Bump logback to 1.5.15 (#373)

Signed-off-by: David Enyeart <[email protected]>

Author: denyeart

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

@@ -7,15 +7,15 @@
 	<properties>
 
 		<!-- Generic properties -->
-		<java.version>1.8</java.version>
+		<java.version>21</java.version>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 
 		<!-- fabric-chaincode-java -->
-		<fabric-chaincode-java.version>2.5.4</fabric-chaincode-java.version>
+		<fabric-chaincode-java.version>2.5.5</fabric-chaincode-java.version>
 
 		<!-- Logging -->
-		<logback.version>1.3.14</logback.version>
+		<logback.version>1.5.15</logback.version>
 		<slf4j.version>1.7.5</slf4j.version>
 
 		<!-- Test -->