Add PR number.

mkelley · mkelley · commit 79e3b42d4461 · 2021-09-22T21:18:42.000-04:00
diff --git a/CHANGES.rst b/CHANGES.rst
@@ -24,7 +24,7 @@ splatalogue
 jplhorizons
 ^^^^^^^^^^^
 
-- Updated to use new JPL Horizons API.
+- Updated to use new JPL Horizons API. [#2154]
 
 Infrastructure, Utility and Other Changes and Additions
 -------------------------------------------------------
