Issue exporting text for type url (NER to Conll)

**Describe the bug**
With a previous version of Label-Studio you could import a full text file as "Time Series", and by adding the parameter you could label the full text for NER.
Once labeled by selecting to export the file to JSON or CONLL, in the file that was downloaded I saw the full text.
Now with version 1.11.0 the text inside the file is just the URL that appears in Label-Studio.

**To Reproduce**
Steps to reproduce the behavior:
1. Go to New Project
2. Create New Project and import a txt file as "Time series or Whole Text File"
3. In labelling interface add
4. Now you can see that the annotation column shows a url /data/upload/sample.txt, but when you click you can see the whole text.
5. When I go to export, and selec JSON or CONLL, the file I dowload only contains inside the text with the url (/data/upload/prueba.txt) and not the whole text with the annotations.

**Expected behavior**
Before I upgrade to the 1.11.0 version I can export the txt and see the whole text inside the downloaded file with annotations.

**Screenshots**
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**Environment (please complete the following information):**
- OS: Win 11
- Label Studio Version 1.11.0

**Additional context**
Add any other context about the problem here.