Update sphinx-rtd-theme requirement from ~=1.2 to ~=1.3 in /docs

[dependabot[bot]]

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

Changelog

Sourced from sphinx-rtd-theme's changelog.

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

• Load jQuery correctly when using latest sphinxcontrib-jquery release (#1448)

.. _release-1.2.0:

1.2.0

Dependency changes

• docutils 0.18 is supported. (#1381)
• Sphinx 6 support added
• Added sphinxcontrib-jquery as a dependency (#1385 #1421)
• Python 3.11 is officially supported and tested. (#1395)
• Python 3.4 and 3.5 are officially not supported (#1395)

Changes

... (truncated)

Commits

• 15ed4de Release 1.3.0 (#1509)
• b583358 1.3.0rc2 (#1495)
• 775bca4 Release 1.3.0rc1 (#1494)
• 04f85fc Add Sphinx 7 support (#1464)
• 9899ee4 Release 1.2.2 (#1484)
• 2442ab9 Remove version logic on sphinxcontrib-jquery, require >=4,<5 (#1446)
• cd6b429 :menuselection: style (#1426)
• 2107797 Contributing updates (#1478)
• 72691f5 Release 1.2.1 (#1474)
• d836ff7 Docs: Typo in recommended pinning (#1476)
• Additional commits viewable in compare view

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