Java: add change note

Author: Jami Cogswell

go/ql/lib/change-notes/2023-02-13-update-create-file-sinks.md

@@ -0,0 +1,5 @@
+---
+category: minorAnalysis
+---
+* Removed the first argument of `java.nio.file.Files#createTempDirectory(String,FileAttribute[])` as a "create-file" sink.
+* Added the first argument of `java.nio.file.Files#copy` as a sink for the `java/path-injection` query.