Librarian Bot: Add base_model information to model

This pull request aims to enrich the metadata of your model by adding [`google/mt5-small`](https://huggingface.co/google/mt5-small) 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). Your input is invaluable to us!

README.md

@@ -1,4 +1,6 @@
 ---
+language:
+- de
 license: apache-2.0
 tags:
 - summarization
@@ -7,12 +9,13 @@ datasets:
 - wiki_lingua
 metrics:
 - rouge
+base_model: google/mt5-small
 model-index:
 - name: wiki_lingua-de-8-3-5.6e-05-mt5-small-finetuned
   results:
   - task:
-      name: Sequence-to-sequence Language Modeling
       type: text2text-generation
+      name: Sequence-to-sequence Language Modeling
     dataset:
       name: wiki_lingua
       type: wiki_lingua
@@ -20,11 +23,9 @@ model-index:
       split: test
       args: de
     metrics:
-    - name: Rouge1
-      type: rouge
+    - type: rouge
       value: 15.2299
-language:
-- de
+      name: Rouge1
 ---
 
 <!-- This model card has been generated automatically according to the information the Trainer had access to. You