[Gradle Release Plugin] - pre tag commit: 'v2.13.0'.

Author: ballerina-bot

gradle.properties

@@ -1,6 +1,6 @@
 org.gradle.caching=true
 group=io.ballerina.stdlib
-version=2.13.0-SNAPSHOT
+version=2.13.0
 puppycrawlCheckstyleVersion=10.12.0
 slf4jVersion=1.7.30
 ballerinaGradlePluginVersion=2.3.0