Add change note

hmac · hmac · commit ca7b48c3d532 · 2022-10-28T11:31:55.000+13:00
diff --git a/ruby/ql/lib/change-notes/2022-10-18-activesupport-flow.md b/ruby/ql/lib/change-notes/2022-10-18-activesupport-flow.md
@@ -0,0 +1,5 @@
+---
+category: minorAnalysis
+---
+* Taint flow is now tracked through extension methods on `Hash`, `String` and
+  `Object` provided by `ActiveSupport`.
