Fix typo in CHANGES.md

Signed-off-by: Cary Phillips <[email protected]>

Author: cary-ilm

CHANGES.md

@@ -1,6 +1,6 @@
 # Imath Release Notes
 
-* [Version 3.1.9](#version-318-May-31-2023) May 31, 2023
+* [Version 3.1.9](#version-319-May-31-2023) May 31, 2023
 * [Version 3.1.8](#version-318-May-22-2023) May 22, 2023
 * [Version 3.1.7](#version-317-March-1-2023) March 1, 2023
 * [Version 3.1.6](#version-316-november-7-2022) November 7, 2022
@@ -24,7 +24,7 @@ Patch release that fixes an correct .so version number introduced in
 v3.1.8. All Imath library functionality is compatible with v3.1.8.
 
 This release also reverts
-[#305](https://github.com/AcademySoftwareFoundation/Imath/pull/305)\],
+[#305](https://github.com/AcademySoftwareFoundation/Imath/pull/305),
 which inadvertently introduced additional python bindings in v3.1.8
 that altered the ABI of ``libPyImath``. ``libPyImath`` is now
 ABI-compatible with v3.1.7 and previous releases.