Add the changelog fragment

changelog.d/1732-no-track-true-heading.md

@@ -0,0 +1,4 @@
+- An aircraft that reports no ground track (parked or taxiing, from adsb.lol
+  or a local receiver) now faces its reported true heading instead of north,
+  so one taxiing south no longer looks like it is moving backwards
+  (samehkhamis, #1732).