[BUG] readthedocs failures

[fkiraly]

Since recently, readthedocs builds fail with a json problem.

There was indeed a , missing in switcher.json, but that did not affect the 2.0.1 release, so I'm not sure what is going on here.

Traceback (most recent call last):
  File "/home/docs/checkouts/readthedocs.org/user_builds/skpro/envs/121/lib/python3.11/site-packages/sphinx/events.py", line 97, in emit
    results.append(listener.handler(self.app, *args))
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/docs/checkouts/readthedocs.org/user_builds/skpro/envs/121/lib/python3.11/site-packages/pydata_sphinx_theme/__init__.py", line 99, in update_config
    switcher_content = json.loads(content)
                       ^^^^^^^^^^^^^^^^^^^
  File "/home/docs/.asdf/installs/python/3.11.4/lib/python3.11/json/__init__.py", line 346, in loads
    return _default_decoder.decode(s)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/docs/.asdf/installs/python/3.11.4/lib/python3.11/json/decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/docs/.asdf/installs/python/3.11.4/lib/python3.11/json/decoder.py", line 353, in raw_decode
    obj, end = self.scan_once(s, idx)
               ^^^^^^^^^^^^^^^^^^^^^^
json.decoder.JSONDecodeError: Expecting ',' delimiter: line 12 column 3 (char 226)

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/docs/checkouts/readthedocs.org/user_builds/skpro/envs/121/lib/python3.11/site-packages/sphinx/cmd/build.py", line 293, in build_main
    app = Sphinx(args.sourcedir, args.confdir, args.outputdir,
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/docs/checkouts/readthedocs.org/user_builds/skpro/envs/121/lib/python3.11/site-packages/sphinx/application.py", line 272, in __init__
    self._init_builder()
  File "/home/docs/checkouts/readthedocs.org/user_builds/skpro/envs/121/lib/python3.11/site-packages/sphinx/application.py", line 343, in _init_builder
    self.events.emit('builder-inited')
  File "/home/docs/checkouts/readthedocs.org/user_builds/skpro/envs/121/lib/python3.11/site-packages/sphinx/events.py", line 108, in emit
    raise ExtensionError(__("Handler %r for event %r threw an exception") %
sphinx.errors.ExtensionError: Handler <function update_config at 0x7f511f19b600> for event 'builder-inited' threw an exception (exception: Expecting ',' delimiter: line 12 column 3 (char 226))

Extension error (pydata_sphinx_theme):
Handler <function update_config at 0x7f511f19b600> for event 'builder-inited' threw an exception (exception: Expecting ',' delimiter: line 12 column 3 (char 226))

[fkiraly]

I suspect this is due to the json switcher being the online version of latest, which is broken, rather than the switcher in the repository.

If this theory is correct, the 2.1.0 release should fix the issues.