Bump sphinx-rtd-theme from 2.0.0 to 3.0.2 in /requirements

[dependabot[bot]]

Bumps sphinx-rtd-theme from 2.0.0 to 3.0.2.

Changelog

Sourced from sphinx-rtd-theme's changelog.

3.0.2

• Show current translation when the flyout is attached
• Fix JavaScript issue that didn't allow users to disable selectors

.. _release-3.0.1:

3.0.1

• Use black color for text in selectors.

.. _release-3.0.0:

3.0.0

Final version.

.. _release-3.0.0rc4:

3.0.0rc4

Fixes

• Trigger "Read the Docs Search addon" when focusing the "Search docs" input in the navbar.

.. _release-3.0.0rc3:

3.0.0rc3

Fixes

• Show hidden version in selector if it's the current active version

.. _release-3.0.0rc2:

3.0.0rc2

Added

• Render version and language selectors below the documentation's title (top left). This can be controlled via the new theme options version_selector and language_selector.

... (truncated)

Commits

• 5f03347 Release 3.0.2
• 17c0685 Attached flyout: show the current translation (#1629)
• 5db7796 Allow disabling selectors (#1626)
• 7b894f5 Release 3.0.1
• 1f2439c Use black color for switcher options (#1615)
• a1c2147 Release 3.0.0
• 814686e Release 3.0.0rc4
• 5b181b8 Trigger search modal on "Search docs" input focus (#1610)
• 7deb68f Release 3.0.0rc3
• 036a3b2 Show hidden version in selector if it's the current active version (#1609)
• Additional commits viewable in compare view

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