Update beautifulsoup4 requirement from <=4.12.3,>=4.9.3 to >=4.9.3,<=4.13.3

[dependabot]

Updates the requirements on beautifulsoup4 to permit the latest version.

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[glenn-jocher]

@Laughing-q can you test this PR please with an Ultralytics docs build?

[Laughing-q]

@glenn-jocher it's not working with beautifulsoup4==4.13.3, same error as we saw before

Traceback (most recent call last):
  File "/home/laughing/anaconda3/bin/mkdocs", line 8, in <module>
    sys.exit(cli())
             ^^^^^
  File "/home/laughing/anaconda3/lib/python3.11/site-packages/click/core.py", line 1157, in __call__
    return self.main(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/laughing/anaconda3/lib/python3.11/site-packages/click/core.py", line 1078, in main
    rv = self.invoke(ctx)
         ^^^^^^^^^^^^^^^^
  File "/home/laughing/anaconda3/lib/python3.11/site-packages/click/core.py", line 1688, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/laughing/anaconda3/lib/python3.11/site-packages/click/core.py", line 1434, in invoke
    return ctx.invoke(self.callback, **ctx.params)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/laughing/anaconda3/lib/python3.11/site-packages/click/core.py", line 783, in invoke
    return __callback(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/laughing/anaconda3/lib/python3.11/site-packages/mkdocs/__main__.py", line 268, in serve_command
    serve.serve(**kwargs)
  File "/home/laughing/anaconda3/lib/python3.11/site-packages/mkdocs/commands/serve.py", line 85, in serve
    builder(config)
  File "/home/laughing/anaconda3/lib/python3.11/site-packages/mkdocs/commands/serve.py", line 67, in builder
    build(config, serve_url=None if is_clean else serve_url, dirty=is_dirty)
  File "/home/laughing/anaconda3/lib/python3.11/site-packages/mkdocs/commands/build.py", line 337, in build
    _build_page(
  File "/home/laughing/anaconda3/lib/python3.11/site-packages/mkdocs/commands/build.py", line 226, in _build_page
    output = config.plugins.on_post_page(output, page=page, config=config)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/laughing/anaconda3/lib/python3.11/site-packages/mkdocs/plugins.py", line 646, in on_post_page
    return self.run_event('post_page', output, page=page, config=config)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/laughing/anaconda3/lib/python3.11/site-packages/mkdocs/plugins.py", line 566, in run_event
    result = method(item, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^
  File "/home/laughing/anaconda3/lib/python3.11/site-packages/plugin/main.py", line 374, in on_post_page
    self.insert_content(soup, div)
  File "/home/laughing/anaconda3/lib/python3.11/site-packages/plugin/main.py", line 173, in insert_content
    md_typeset.append(content_to_insert)
  File "/home/laughing/anaconda3/lib/python3.11/site-packages/bs4/element.py", line 2054, in append
    return self.insert(len(self.contents), tag)[0]
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^
IndexError: list index out of range

There are some breaking changes from the beautifulsoup4 team from 4.12.xx to 4.13.x, we need to either update our mkdocs plugin repo completely compatible with 4.13.x or pin <=4.12.x.

[dependabot]

Superseded by #130.