Update that we support more than Vega-Lite 4

README.md

@@ -3,7 +3,7 @@
 [![npm version](https://img.shields.io/npm/v/jupyter-vega.svg)](https://www.npmjs.com/package/jupyter-vega)
 [![Build Status](https://github.com/vega/ipyvega/workflows/Test/badge.svg)](https://github.com/vega/ipyvega/actions)
 
-IPython/Jupyter notebook module for [Vega 5](https://github.com/vega/vega), and [Vega-Lite 4](https://github.com/vega/vega-lite). Notebooks with embedded visualizations can be viewed on [GitHub](https://github.com/vega/ipyvega/blob/master/notebooks/VegaLite.ipynb) and [nbviewer](https://nbviewer.jupyter.org/github/vega/ipyvega/blob/master/notebooks/VegaLite.ipynb). If you use JupyterLab (not the notebook), you don't need to install this extension since JupyterLab comes with built-in support for Vega and Vega-Lite.
+IPython/Jupyter notebook module for [Vega](https://github.com/vega/vega), and [Vega-Lite](https://github.com/vega/vega-lite). Notebooks with embedded visualizations can be viewed on [GitHub](https://github.com/vega/ipyvega/blob/master/notebooks/VegaLite.ipynb) and [nbviewer](https://nbviewer.jupyter.org/github/vega/ipyvega/blob/master/notebooks/VegaLite.ipynb). If you use JupyterLab (not the notebook), you don't need to install this extension since JupyterLab comes with built-in support for Vega and Vega-Lite.
 
 Available on [pypi](https://pypi.python.org/pypi/vega) and [Conda Forge](https://anaconda.org/conda-forge/vega) as `vega`.