Make the planning meetings public

[agriyakhetarpal]

@Schefflera-Arboricola mentioned on Zulip:

Can we publish the meetings calendar and notes, and make the planning meetings open to all? We can also add a calendar page on the SciPy India website with different calendars that people could subscribe to like for events, for planning meetings, etc.

@malayajac, as you've created the invite, could you please help with this? Thanks!