Add entry to CHANGELOG.md (#12142)

CHANGELOG.md

@@ -111,6 +111,7 @@ Note that this project **does not** adhere to [Semantic Versioning](https://semv
 - We fixed an issue where we display warning message for moving attached open files. [#10121](https://github.com/JabRef/jabref/issues/10121)
 - We fixed an issue where it was not possible to select selecting content of other user's comments.[#11106](https://github.com/JabRef/jabref/issues/11106)
 - We fixed an issue where web search preferences "Custom API key" table modifications not discarded. [#11925](https://github.com/JabRef/jabref/issues/11925)
+- We fixed an issue when opening attached files in [extra file columns](https://docs.jabref.org/finding-sorting-and-cleaning-entries/filelinks#adding-additional-columns-to-entry-table-for-file-types). [#12005](https://github.com/JabRef/jabref/issues/12005)
 - We fixed an issue where trying to open a library from a failed mounted directory on Mac would cause an error. [#10548](https://github.com/JabRef/jabref/issues/10548)
 - We fixed an issue where identifier paste couldn't work with Unicode REPLACEMENT CHARACTER. [#11986](https://github.com/JabRef/jabref/issues/11986)