AP-25819: Update readthedocs build os to ubunutu 24.04

[HedgehogCode]

AP-25819 (Update Python API Doc generation at RTD to use Ubuntu 24.04)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[HedgehogCode]

Build: https://app.readthedocs.org/projects/knime-python/builds/32202707/
Build Output: https://knime-python.readthedocs.io/en/todo-ap-25819-readthedocs-update/extension-development.html (only visible via the link)

Please delete the version from https://app.readthedocs.org/projects/knime-python/ when merging the PR.

[Copilot]

Pull request overview

Updates the Read the Docs configuration to build the Python API documentation on a newer Ubuntu image and Python runtime, aligning the RTD environment with current tooling.

Changes:

• Bump RTD build OS from Ubuntu 20.04 to Ubuntu 24.04.
• Bump RTD Python toolchain from Python 3.9 to Python 3.12.
• Touch the RTD python.install requirements entry (indentation change).

[Copilot]

In the python: section, the - requirements: ... entry is indented at the same level as install:. In RTD v2 config, python.install is a list, so the dash entry needs to be nested under install:; otherwise YAML parses - requirements as a sibling of install (and the requirements may not get installed / config may be invalid). Please indent the list item one level deeper under install:.

Suggested change

	- requirements: doc/requirements.txt
	- requirements: doc/requirements.txt