Fix Word legacy spelling errors reporting

[CyrilleB79]

Link to issue number:

Fix-up of #17997

Reported on French mailing list.

Summary of the issue:

In 2026.1beta versions, spelling errors are no longer reported in Word legacy.

Description of user facing changes:

Spelling errors can now again be reported in Word legacy.

Description of developer facing changes:

N/A

Description of development approach:

In #17997, the config key "reportSpellingErrors" has been modified to "reportSpellingErrors2" due to upgrade. But one use of this config key has been forgotten. It is being fixed here.

Testing strategy:

Manual tests with legacy and UIA Word.

Known issues with pull request:

N/A

Code Review Checklist:

• Documentation:
  • Change log entry
  • User Documentation
  • Developer / Technical Documentation
  • Context sensitive help for GUI changes
• Testing:
  • Unit tests
  • System (end to end) tests
  • Manual testing
• UX of all users considered:
  • Speech
  • Braille
  • Low Vision
  • Different web browsers
  • Localization in other languages / culture than English
• API is compatible with existing add-ons.
• Security precautions taken.

[CyrilleB79]

There are failed system tests, but I guess they are unrelated.
Having them failing quite regularly make us ignore them though what is probably not desirable.