Correct pipeline tag, add library and license

This PR corrects the `pipeline_tag` to `image-text-to-text` to accurately reflect the model's multimodal capabilities. It also adds the `library_name` as `transformers` and specifies the `license` as `apache-2.0`. This improves the model card's accuracy and discoverability.

README.md

@@ -1,5 +1,4 @@
 ---
-pipeline_tag: text-generation
 datasets:
 - liupf/ChEBI-20-MM
 - BAAI/CMMU
@@ -7,6 +6,9 @@ datasets:
 language:
 - en
 - zh
+pipeline_tag: image-text-to-text
+library_name: transformers
+license: apache-2.0
 ---
 
 ## Citation