[jupyter] use JSROOT v6.1.1 as fallback in notebooks
[jupyter] use JSROOT v6.1.1 as fallback in notebooks

There is important bugfix for TFrame drawing, which affects interactive
features
olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root