Update README.md to add a new section "Upgrading an existing installa…

…tion" (aws#412)
cloudgeekpro · Dec 19, 2022 · 1800c1a · 1800c1a
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@@ -163,6 +163,15 @@ Alternatively, the magic extensions can be manually reloaded for a single notebo
 %load_ext graph_notebook.magics
 ```
 
+## Upgrading an existing installation
+
+```
+# upgrade graph-notebook
+pip install graph-notebook --upgrade
+```
+
+After the above command completes, rerun the commands given at [Jupyter Classic Notebook](#jupyter-classic-notebook) or [JupyterLab 3.x](#jupyterlab-3x) based on which flavour is installed.
+
 ## Connecting to a graph database
 
 ### Gremlin Server