Update README.md

This is a ONNX compatible version of [deutsche-telekom/electra-base-de-squad2](https://huggingface.co/deutsche-telekom/electra-base-de-squad2). It is intended to be used with [https://huggingface.co/docs/transformers.js/index](transformers.js).

README.md

@@ -1,3 +1,7 @@
 ---
 license: mit
----
+language:
+- de
+library_name: transformers.js
+pipeline_tag: question-answering
+---