Librarian Bot: Add base_model information to model

This pull request aims to enrich the metadata of your model by adding [`Michelvh/flan-t5-end2end-question-generation`](https://huggingface.co/Michelvh/flan-t5-end2end-question-generation) 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

@@ -2,17 +2,18 @@
 license: apache-2.0
 tags:
 - generated_from_trainer
-model-index:
-- name: flan-t5-end2end-question-generation
-  results: []
 pipeline_tag: text2text-generation
 inference:
   parameters:
-      max_length: 256
-      num_beams: 4
-      length_penalty: 1.5
-      no_repeat_ngram_size: 3
-      early_stopping: True
+    max_length: 256
+    num_beams: 4
+    length_penalty: 1.5
+    no_repeat_ngram_size: 3
+    early_stopping: true
+base_model: Michelvh/flan-t5-end2end-question-generation
+model-index:
+- name: flan-t5-end2end-question-generation
+  results: []
 ---
 
 <!-- This model card has been generated automatically according to the information the Trainer had access to. You