add change-note

Author: erik-krogh

python/ql/lib/change-notes/2023-06-09-delete-deps.md

@@ -0,0 +1,9 @@
+---
+category: minorAnalysis
+---
+* Deleted many deprecated predicates and classes with uppercase `API`, `HTTP`, `XSS`, `SQL`, etc. in their names. Use the PascalCased versions instead.
+* Deleted the deprecated `getName()` predicate from the `Container` class, use `getAbsolutePath()` instead.
+* Deleted many deprecated module names that started with a lowercase letter, use the versions that start with an uppercase letter instead.
+* Deleted many deprecated predicates in `PointsTo.qll`. 
+* Deleted many deprecated files from the `semmle.python.security` package.
+* Deleted the deprecated `BottleRoutePointToExtension` class from `Extensions.qll`.