Have publishing tasks explicitly depend on signing

Without the dependency, publishing fails with this error:
> Task ':publishKotlinMultiplatformPublicationToMavenRepository' uses this output of task ':signJvmPublication' without declaring an explicit or implicit dependency. This can lead to incorrect results being produced, depending on what order the tasks are executed.

build.gradle.kts

@@ -129,6 +129,12 @@ signing {
     )
 
     sign(publishing.publications)
+
+    // https://github.com/gradle/gradle/issues/26091#issuecomment-1722947958
+    tasks.withType<AbstractPublishToMaven>().configureEach {
+        val signingTasks = tasks.withType<Sign>()
+        mustRunAfter(signingTasks)
+    }
 }
 
 publishing {