Adding `transformers` as the model library name

After https://github.com/huggingface/transformers/pull/41621 is merged we should merge this PR.

This would help with code snippet generation and much more.

README.md

@@ -1,4 +1,3 @@
-
 ---
 license: apache-2.0
 language:
@@ -12,7 +11,7 @@ language:
 - sv
 - da
 base_model: lightonai/LightOnOCR-1B-1025
-library_name: vllm
+library_name: transformers
 tags:
 - ocr
 - document-understanding