Clarify which track is being talked about

(cherry picked from commit b526390c2088c84af320a42c9c1a9419ac56fe1f)

tutorials/animation/introduction.rst

@@ -252,7 +252,7 @@ in the next chapter.
 Track settings
 ~~~~~~~~~~~~~~
 
-Each track has a settings panel at the end, where you can set its update
+Each property track has a settings panel at the end, where you can set its update
 mode, track interpolation, and loop mode.
 
 .. figure:: img/animation_track_settings.webp