Librarian Bot: Add base_model information to model

This pull request aims to enrich the metadata of your model by adding the `xlm-roberta-base` as a `base_model` field, situated in the `YAML` block of your model's `README.md`.

How did we find this information? We performed a regular expression match on your `README.md` file to determine the connection.

**Why add this?** Enhancing your model's metadata in this way:
- **Boosts Discoverability** - It becomes straightforward to trace the relationships between various models on the Hugging Face Hub.
- **Highlights Impact** - It showcases the contributions and influences different models have within the community.

For a hands-on example of how such metadata can play a pivotal role in mapping model connections, take a look at [librarian-bots/base_model_explorer](https://huggingface.co/spaces/librarian-bots/base_model_explorer).

This PR comes courtesy of Librarian Bot. If you have any feedback, queries, or need assistance, please don't hesitate to reach out to [@davanstrien](https://huggingface.co/davanstrien). Your input is invaluable to us!

README.md

@@ -1,19 +1,20 @@
 ---
-license: mit
-language: 
+language:
 - ja
+license: mit
 tags:
 - generated_from_trainer
 - ner
 - bert
 metrics:
 - f1
+widget:
+- text: 鈴木は4月の陽気の良い日に、鈴をつけて熊本県の阿蘇山に登った
+- text: 中国では、中国共産党による一党統治が続く
+base_model: xlm-roberta-base
 model-index:
 - name: xlm-roberta-ner-ja
   results: []
-widget:
-- text: "鈴木は4月の陽気の良い日に、鈴をつけて熊本県の阿蘇山に登った"
-- text: "中国では、中国共産党による一党統治が続く"
 ---
 
 <!-- This model card has been generated automatically according to the information the Trainer had access to. You