[FLINK-39926][release] Update japicmp configuration for 1.20.5

Author: yunfengzhou-hub

pom.xml

@@ -176,7 +176,7 @@ under the License.
 		<minikdc.version>3.2.4</minikdc.version>
 		<hive.version>2.3.10</hive.version>
 		<orc.version>1.5.6</orc.version>
-		<japicmp.referenceVersion>1.20.3</japicmp.referenceVersion>
+		<japicmp.referenceVersion>1.20.5</japicmp.referenceVersion>
 		<japicmp.outputDir>tools/japicmp-output</japicmp.outputDir>
 		<checkstyle.version>9.3</checkstyle.version>
 		<!-- can be removed with maven-spotless-plugin:2.38+ -->