Do not mark the serialization JPMS dependency as transitive

See <https://stackoverflow.com/questions/77644309/are-jpms-modifiers-static-and-transitive-incompatible>

Author: dkhalanskyjb

core/jvm/java9/module-info.java

@@ -1,6 +1,6 @@
 module kotlinx.datetime {
     requires transitive kotlin.stdlib;
-    requires transitive static kotlinx.serialization.core;
+    requires static kotlinx.serialization.core;
 
     exports kotlinx.datetime;
     exports kotlinx.datetime.serializers;