Closes JabRef#13673

I was not sure if i needed to add something to the CHANGELOG.md, but i did just in case.

Steps to test

(on the main branch and this branch)

1. Open Jabref GUI
2. Create or import an article with a working DOI(Library-> add entry/ add entry using... or with the web search feature)
3. Then select the journal entry at the bottom page with a click
4. Empty the "Year" Textfield in the "Required Fields" Tab
5. Switch to the General Tab
6. Input the DOI (If its not already filled)
7. Click the button "Get bibliographic data from DOI"

The button in the General Tab:

The error message before the changes:

The article with the changes:

Mandatory checks

• I own the copyright of the code submitted and I license it under the MIT license
• Change in CHANGELOG.md described in a way that is understandable for the average user (if change is visible to the user)
• Tests created for changes (if applicable)
• Manually tested changed features in running JabRef (always required)
• Screenshots added in PR description (if change is visible to the user)
• Checked developer's documentation: Is the information available and up to date? If not, I outlined it in this pull request.
• Checked documentation: Is the information available and up to date? If not, I created an issue at https://github.com/JabRef/user-documentation/issues or, even better, I submitted a pull request to the documentation repository.