Add fixed IndexOutOfBoundsException to CHANGELOG.md (#14128)

* Add fixed IndexOutOfBoundsException to CHANGELOG.md

closes #8012
closes #12815
closes #8217

Not sure, what commit exactly fixed all these issues, but since they have been very annoying to users, I think it's something worth mentioning in the changelog that they seem to be gone.

Successful commits could be found via [Git-bisect](https://git-scm.com/docs/git-bisect)

JabRef has become better and the 6.0 release is something to look forward to!

* Apply review comment

Co-authored-by: Subhramit Basu <[email protected]>

* Add #8281

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Co-authored-by: Subhramit Basu <[email protected]>

Author: ThiloteE

CHANGELOG.md

@@ -158,6 +158,7 @@ Note that this project **does not** adhere to [Semantic Versioning](https://semv
 - We fixed an issue where the "Applications to push entries to" list in the preferences was not sorted alphabetically. [#14058](https://github.com/JabRef/jabref/issues/14058)
 - We fixed an issue where notice text in AI chat was not automatically refreshed when the user changed preferences.[#13855](https://github.com/JabRef/jabref/issues/13855)
 - We fixed an issue where the user could add custom entry types with spaces in their names. [#14088](https://github.com/JabRef/jabref/issues/14088)
+- We fixed various issues that triggered `IndexOutOfBoundsException`s, when editing entries. [#8012](https://github.com/JabRef/jabref/issues/8012), [#8826](https://github.com/JabRef/jabref/issues/8826), [#8217](https://github.com/JabRef/jabref/issues/8217), [#8281](https://github.com/JabRef/jabref/issues/8281)
 
 ### Removed