Add change log notes

GeekMasher · GeekMasher · commit ffec22a5d242 · 2023-04-12T14:48:28.000Z
diff --git a/java/ql/lib/change-notes/2023-04-12-new-models-io.md b/java/ql/lib/change-notes/2023-04-12-new-models-io.md
@@ -0,0 +1,6 @@
+---
+category: minorAnalysis
+---
+* Added models for the following packages:
+  * java.io
+  * java.nio.file
