Add Missing JupyterCon until 2024

[ELC]

These are all the editions of JupyterCon:

• 2024 - No conference was held
• 2023 - Add JupyterCon 2023 #1288
• 2022 - No conference was held
• 2021 - No conference was held
• 2020 - Add JupyterCon 2020 #1287
• 2019 - No conference was held
• 2018 - Already cataloged - https://pyvideo.org/events/jupytercon-2018.html
• 2017 - Already cataloged - https://pyvideo.org/events/jupytercon-2017.html