Rust: Add change note

Author: hvitved

rust/ql/lib/change-notes/2026-08-05-data-flow-alert-locations.md

@@ -0,0 +1,12 @@
+---
+category: majorAnalysis
+---
+* The alert locations for data flow queries have been improved. The new locations are more precise and are based on the actual source and sink nodes. Example:
+```rust
+let _ = conn.query(
+//      ^^^^                 old alert location
+    unsafe_query.as_str(),
+//  ^^^^^^^^^^^^^^^^^^^^^    new alert location
+)?;
+```
+This means that some alerts will have their locations changed, and hence appear as new alerts (while the old alerts will disappear).