Update model card

README.md

@@ -14,7 +14,7 @@ base_model:
 
 # pdftool models
 
-ONNX exports of the models used by [pdftool](https://github.com/benbaker76/pdftool), a C++ command-line
+ONNX exports of the models used by pdftool, a C++ command-line
 tool that converts PDFs to Markdown and translates PDFs in place. They run on ONNX Runtime with no
 Python involved.