Ruby: add a change note for rails render locals dataflow

Author: alexrford

ruby/ql/lib/change-notes/2023-01-13-flow-through-render-locals.md

@@ -0,0 +1,4 @@
+---
+category: minorAnalysis
+---
+* Data flowing from the `locals` argument of a Rails `render` call is now tracked to uses of that data in an associated view.