docs(changelog): move the verticalRateMps entry to the top of the file

On current main the line it was anchored to sits under the released 0.2.0
heading, so the entry landed there. It now leads the unreleased entries.

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+- The tracked-aircraft descriptor now publishes `verticalRateMps`, on both the
+  civil and military layers, so a consumer reading `getTrackedInfo()` no longer
+  has to reach past it into the raw poll record for climb/descent. Reported,
+  never derived: an aircraft that has not transmitted a rate reads as `null`
+  rather than a level-flight `0`.
+
 - Cyclone advisories no longer go dark while NHC publishes an advisory ahead
   of its nominal time: advisory and position times up to 90 minutes ahead of
   the server clock are accepted (previously 5 minutes), so the whole feed is
@@ -719,11 +725,6 @@
   Native point, billboard and label highlighting uses GPU draw commands; there
   is no scene-dimming effect selector. Unsupported shaders retain native contact
   rendering, and leaving Cyber restores the standard shell and contact treatment.
-- The tracked-aircraft descriptor now publishes `verticalRateMps`, on both the
-  civil and military layers, so a consumer reading `getTrackedInfo()` no longer
-  has to reach past it into the raw poll record for climb/descent. Reported,
-  never derived: an aircraft that has not transmitted a rate reads as `null`
-  rather than a level-flight `0`.
 
 - Add a **Recent Imagery** data layer (NASA GIBS · HLS + VIIRS, keyless).
   Select a box (drag, the current view, or around a pin; up to 1,000 km a