Fixed Repo link in README and added PyPI badge.

README.md

 # Jupyter-RDFify
+[![PyPI](https://img.shields.io/pypi/v/jupyter-rdfify)](https://pypi.org/project/jupyter-rdfify/)
 ![Cells showing Jupyter-RDFify features](img/cells.png)  
 IPython Extension for semantic web technology support (Turtle, SPARQL, ShEx, etc.)
 

setup.py

@@ -11,7 +11,7 @@ setuptools.setup(
     description="IPython Extension for semantic web technology support (Turtle, SPARQL, ShEx, etc.)",
     long_description=long_description,
     long_description_content_type="text/markdown",
-    url="https://git.rwth-aachen.de/i5/teaching/jupyter-rdfify",
+    url="https://github.com/SemWebNotebooks/Jupyter-RDFify",
     packages=setuptools.find_packages(),
     install_requires=[
         "rdflib",