Librarian Bot: Add base_model information to model

This pull request aims to enrich the metadata of your model by adding [`facebook/mbart-large-50`](https://huggingface.co/facebook/mbart-large-50) 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](https://huggingface.co/librarian-bot). If you have any feedback, queries, or need assistance, please don't hesitate to reach out to [@davanstrien](https://huggingface.co/davanstrien).

If you want to automatically add `base_model` metadata to more of your modes you can use the [Librarian Bot](https://huggingface.co/librarian-bot) [Metadata Request Service](https://huggingface.co/spaces/librarian-bots/metadata_request_service)!

README.md

@@ -5,20 +5,21 @@ datasets:
 - mlsum
 metrics:
 - rouge
+base_model: facebook/mbart-large-50
 model-index:
 - name: mbart-large-turkish-sum
   results:
   - task:
-      name: Summarization
       type: summarization
+      name: Summarization
     dataset:
       name: mlsum tu
       type: mlsum
       args: tu
     metrics:
-    - name: Rouge1
-      type: rouge
+    - type: rouge
       value: 46.7011
+      name: Rouge1
 ---
 
 # [Mukayese: Turkish NLP Strikes Back](https://arxiv.org/abs/2203.01215)