[Snyk] Security upgrade anyio from 3.7.1 to 4.4.0

[bashtage]

This PR was automatically created by Snyk using the credentials of a real user.


Snyk has created this PR to fix 1 vulnerabilities in the pip dependencies of this project.

Snyk changed the following file(s):

• doc/requirements.txt

⚠️ Warning

``` statsmodels 0.13.5 requires scipy, which is not installed. statsmodels 0.13.5 requires scipy, which is not installed. qtconsole 5.4.4 requires pyzmq, which is not installed. oldest-supported-numpy 2023.12.21 has requirement numpy==1.14.5; python_version == "3.7" and platform_machine not in "arm64|aarch64|loongarch64" and platform_system != "AIX" and platform_python_implementation != "PyPy", but you have numpy 1.21.3. notebook 6.5.7 requires pyzmq, which is not installed. matplotlib 3.5.3 requires fonttools, which is not installed. jupyter-server 1.24.0 requires pyzmq, which is not installed. jupyter-console 6.6.3 requires pyzmq, which is not installed. jupyter-client 7.4.9 requires pyzmq, which is not installed. ipykernel 6.16.2 requires pyzmq, which is not installed.

</details>





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> [!IMPORTANT]
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