Docs: Add custom fine-tuning tutorial to TrOCR model page (#38847)

* Update trocr.md

Docs: add community fine‑tuning notebook link to TrOCR page

* apply suggested changes from PR review

Co-authored-by: Steven Liu <[email protected]>

* Update docs/source/en/model_doc/trocr.md

Co-authored-by: Steven Liu <[email protected]>

---------

Co-authored-by: Steven Liu <[email protected]>

Author: Ashutosh-4485

docs/source/en/model_doc/trocr.md

@@ -56,6 +56,7 @@ This model was contributed by [nielsr](https://huggingface.co/nielsr). The origi
   on both printed (e.g. the [SROIE dataset](https://paperswithcode.com/dataset/sroie) and handwritten (e.g. the [IAM
   Handwriting dataset](https://fki.tic.heia-fr.ch/databases/iam-handwriting-database>) text recognition tasks. For more
   information, see the [official models](https://huggingface.co/models?other=trocr>).
+- [Fine‑tune TrOCR on your own OCR dataset](https://github.com/Ashutosh-4485/trocr-custom-fine-tune.git).
 - TrOCR is always used within the [VisionEncoderDecoder](vision-encoder-decoder) framework.
 
 ## Resources