Update changelog

CHANGES.md

@@ -4,6 +4,7 @@
 
 ### Features
 
+* All commands: Allow repeating an option that takes multiple values. Previously, if options were set using separate option flags (e.g. `--exclude-where 'region=A' 'region=B'`), only the last flag would be used. Now, all values will be used. [#1445][] (@victorlin)
 * ancestral, translate: output node data files are now validated. The argument `--validation-mode` is added which controls this behaviour (default: error). This argument also controls validation of the input node-data file (ancestral only). [#1440][] (@jameshadfield)
 
 ### Bug Fixes
@@ -12,6 +13,7 @@
 * validation: we no longer perform any validation when the requested validation mode is "skip" [#1440][] (@jameshadfield)
 
 [#1440]: https://github.com/nextstrain/augur/pull/1440
+[#1445]: https://github.com/nextstrain/augur/pull/1445
 
 ## 24.3.0 (18 March 2024)