Sphinx dependency conflict fix (backport #740)

[mergify]

Description:
This pull request fixes the docutils version conflict encountered when setting up a micro-ROS workspace with Zephyr, as reported in issue #739.

Problem:

The issue arises because sphinx-rtd-theme (version 0.5.2) requires docutils<0.17, but during the setup process, docutils 0.17.1 is installed, causing the following error:

ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
sphinx-rtd-theme 0.5.2 requires docutils<0.17, but you have docutils 0.17.1 which is incompatible.

Solution:

To resolve this, I modified the create.sh script located at config/zephyr/generic/ by pinning the docutils version to 0.16, which is compatible with sphinx-rtd-theme. The change is at line 70 of the script:

pip install --force-reinstall docutils==0.16 Sphinx==4.2.0

Testing:

The solution was tested in both my local environment (Ubuntu 22.04.5 LTS) and in the official Humble Docker container. The issue was reproducible in both environments, and the fix successfully resolved the version conflict in both cases.

Related Issue:

This PR fixes issue #739.

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This is an automatic backport of pull request #740 done by Mergify.