Fix fatal error in the PDF text extraction from the media row actions.

[iamdharmesh]

Description of the Change

PR fixes the fatal error reported in #701. Currrently, when we try to extract text from PDF using the media list table row actions. it throws a fatal error. This PR fixes it.

Closes #701

How to test the Change

1. Go to Media > Add New Media File
2. Upload PDF file
3. Go to Media > Library
4. Switch view mode to list, it will change media view to list table view.
5. Click on the "Extract text from PDF" action of uploaded PDF file
6. Verify there is no fatal error and text extracted from the PDF.

Changelog Entry

Fixed - Ensure that the "Extract text from PDF" row action works properly in the media list table.

Credits

Props @qasumitbagthariya @iamdharmesh

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests pass.