🔧 Switch to the PyViz tutorial in English

Author: veit

docs/conf.py

@@ -172,7 +172,7 @@
     "ipyparallel": ("https://ipyparallel.readthedocs.io/en/latest", None),
     "bokeh": ("https://docs.bokeh.org/en/latest", None),
     "pandas": ("https://pandas.pydata.org/pandas-docs/stable", None),
-    "pyviz": ("https://pyviz-tutorial.readthedocs.io/de/latest", None),
+    "pyviz": ("https://pyviz-tutorial.readthedocs.io/en/latest", None),
     "python-basics": (
         "https://python-basics-tutorial.readthedocs.io/en/latest",
         None,