Update podcasts on A/V page

[hugovk]

Is your feature request related to a problem? Please describe.

Update the list of podcasts at https://www.python.org/doc/av/

Describe the solution you'd like

Move Podcast.__init__ to the inactive list.

Add these to the active list:

• https://podcasters.spotify.com/pod/show/corepy
• https://pythonbytes.fm/
• https://podcast.pythontest.com/
• https://pythonpeople.fm/
• https://pythoncommunitynews.transistor.fm/
• https://djangochat.com/
• https://www.pybitespodcast.com/
• https://podcasters.spotify.com/pod/show/sad-python-girls-club

Describe alternatives you've considered No changes, or find another page to link to that can list these.

Additional context

Brought up at https://github.com/python/editorial-board/issues/1.