Move the changelog entry into changelog.d

Main now takes release notes as one fragment per pull request (#787).

CHANGELOG.md

@@ -1,9 +1,5 @@
 # Changelog
 
-- Military aircraft keep their last heading and speed when an adsb.lol row omits
-  `track` or `gs`, instead of turning north and stopping; a grounded row without
-  a speed still reads 0.
-
 - Local FM seek finds stations after wrapping around 87.5–108 MHz, covers both
   band edges, skips the starting station and rejects spectra from an earlier
   tune (Aditya, @Rohilalala, #1174).

changelog.d/1096-military-hold-track-speed.md

@@ -0,0 +1,3 @@
+- Military aircraft keep their last heading and speed when an adsb.lol row omits
+  `track` or `gs`, instead of turning north and stopping; a grounded row without
+  a speed still reads 0 (Aditya, @Rohilalala, #1096).