Documentation: Bump docutils from 0.18.1 to 0.19

[lupyuen]

Summary

This PR bumps the version of docutils from 0.18.1 to 0.19, as requested by dependabot:

• build(deps): bump tornado from 6.4.1 to 6.4.2 in /Documentation #14910

Impact

Documentation builds correctly. Dependency on tornado is no longer required after updating to docutils 0.19.

Testing

Tested OK by inspecting the Generated HTML at Documentation/_build/html/components/index.html

[nuttxpr]

[Experimental Bot, please feedback here]

Fill In The Commit Message: This PR contains a Commit with an Empty Commit Message. Please fill in the Commit Message with the PR Summary.

Impact

• Is new feature added? NO
• Is existing feature changed? NO
• Impact on user (will user need to adapt to change)? NO
• Impact on build (will build process change)? Potentially YES. A newer version of docutils may have different build dependencies or require changes to the build system. This needs investigation and testing.
• Impact on hardware (will arch(s) / board(s) / driver(s) change)? NO
• Impact on documentation (is update required / provided)? Potentially YES. If the docutils update changes the generated documentation format or behavior, adjustments to the documentation source or build process may be needed. This should be checked.
• Impact on security (any sort of implications)? Potentially YES. Version bumps often address security vulnerabilities. This should be reviewed in the docutils changelog.
• Impact on compatibility (backward/forward/interoperability)? Potentially YES. The updated docutils version might have breaking changes that affect how NuttX documentation is generated. This must be tested.
• Anything else to consider? Consider running the documentation build process and checking the resulting HTML for any changes or regressions.

Testing

TODO: This section needs actual testing results. You should build and test on at least one representative configuration before and after the change. Include the relevant build and test logs here. Consider testing the documentation build specifically. If you have encountered build issues, detail those here. Indicate the host and target environments used for testing (OS, architecture, compiler). For example:

• Build Host(s): Linux (Ubuntu 22.04), x86_64, GCC 11.4
• Target(s): sim:qemu-x86_64

Testing logs before change:

#  Provide commands used and their output. For example:
make distclean
./tools/configure.sh sim:qemu-x86_64
make
make doc
# ... (include relevant snippets from the build output and documentation generation)

Testing logs after change:

# Repeat the same commands as above after applying the patch
make distclean
./tools/configure.sh sim:qemu-x86_64
make
make doc
# ... (include relevant snippets from the build output and documentation generation)