docs: update screenshot

Author: mariobuikhuizen

README.md

@@ -26,7 +26,7 @@ Add snippets in `[jupyter_data_dir]/code_snippets` (see: https://jupyter.readthe
 
 In JupyterLab, use the "Code Snippets" menu to select the snippet:
 
-![screenshot](./screenshot.png)
+<img width="398" alt="Schermafbeelding 2020-03-26 om 13 16 34" src="https://user-images.githubusercontent.com/46192475/77646139-40a21c00-6f64-11ea-9073-fe2d1052928f.png">
 
 
 ## Troubleshoot