Update changelog

Author: lfborjas

ChangeLog.md

@@ -1,9 +1,11 @@
 # Changelog for swiss-ephemeris
 
-## NEXT
+## v1.3.0.1 
+ 
+A couple of memory safety patches:
 
-* [dev] Attempt to rein in memory unsafety by keeping all pointer peeking in IO.
-* [dev] Always allocate 256 chars for error messages. 
+* Attempt to rein in memory unsafety by keeping all pointer peeking in IO for gravGroup fns.
+* Always allocate 256 chars for error messages. 
 * [dev] Bundle test ephemeris into the hackage tarball, to allow hackage CI and nixOS to
   successfully run tests.