fix release ci issue

Author: wenxi-zeng

core/build.gradle

@@ -38,4 +38,8 @@ dependencies {
 
 apply from: rootProject.file('gradle/artifacts-core.gradle')
 apply from: rootProject.file('gradle/mvn-publish.gradle')
-apply from: rootProject.file('gradle/codecov.gradle')
+apply from: rootProject.file('gradle/codecov.gradle')
+
+tasks.named("signReleasePublication") {
+    dependsOn("jar")
+}