build(deps-dev): update sphinx-rtd-theme requirement from ^1.0.0 to ^2.0.0

[dependabot[bot]]

Updates the requirements on sphinx-rtd-theme to permit the latest version.

Changelog

Sourced from sphinx-rtd-theme's changelog.

2.0.0

Added

• Support for Sphinx versions 6.x and 7.x
• Support for docutils <=0.20

Deprecations

• The HTML4 writer is now officially deprecated. An error will be thrown if your project configuration still uses the HTML4 writer.
• Support for Sphinx versions < 5.0 was removed.
• In addition, our supported dependencies will match the dependencies from our lowest supported Sphinx release, version 5.0: Python >= 3.6 and docutils > 0.14 and < 0.19

.. _release-1.3.0:

1.3.0

Added

• Relaxed requirements to include Sphinx release 7.0

.. _release-1.2.2:

1.2.2

Fixes

• Require sphinxcontrib-jquery>=4,<5 (#1446)

Added

• Styling for :menuselection: (#1426)

.. _release-1.2.1:

1.2.1

Fixes

... (truncated)

Commits

• 7c9b1b5 Release 2.0 final (#1544)
• c104410 Bump for next potential release, 2.0.0rc5 (#1539)
• 53ca116 Release 2.0.0rc4 (#1538)
• 4498e97 Fix AttributeError when one of css_files is a string (#1537)
• 84aea9b Increment for next potential release (#1536)
• febde39 Release 2.0.0rc3 (#1535)
• 32310a8 Fix #1522: fix 'str' object has no attribute 'attributes' (#1528)
• 8ce23ce Version bump for 2.0rc3 development (#1521)
• 46f5307 Release 2.0rc2 (#1520)
• 5838e6a Add support for docutils==0.20.x (#1517)
• Additional commits viewable in compare view

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