[Snyk] Fix for 6 vulnerabilities

[adoshi]

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

Snyk has created this PR to fix one or more vulnerable packages in the `pip` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • doc-requirements.txt

⚠️ Warning

virtualenv 20.25.0 has requirement platformdirs<5,>=3.9.1, but you have platformdirs 2.6.2.
virtualenv 20.25.0 has requirement filelock<4,>=3.12.2, but you have filelock 3.9.0.
virtualenv 20.25.0 has requirement distlib<1,>=0.3.7, but you have distlib 0.3.6.
virtualenv 20.25.0 has requirement importlib-metadata>=6.6; python_version < "3.8", but you have importlib-metadata 6.0.0.
sphinxext-remoteliteralinclude 0.4.0 has requirement MarkupSafe<=2.0.1; python_version < "3.8", but you have MarkupSafe 2.1.2.
Sphinx 4.5.0 requires sphinxcontrib-htmlhelp, which is not installed.
Sphinx 4.5.0 requires sphinxcontrib-applehelp, which is not installed.

Vulnerabilities that will be fixed

By pinning:

Severity	Priority Score (*)	Issue	Upgrade	Breaking Change	Exploit Maturity
	704/1000 Why? Has a fix available, CVSS 9.8	Improper Following of a Certificate's Chain of Trust SNYK-PYTHON-CERTIFI-5805047	certifi: 2022.12.7 -> 2023.7.22	No	No Known Exploit
	484/1000 Why? Has a fix available, CVSS 5.4	Cross-site Scripting (XSS) SNYK-PYTHON-JINJA2-6150717	jinja2: 3.0.3 -> 3.1.3	No	No Known Exploit
	479/1000 Why? Has a fix available, CVSS 5.3	Regular Expression Denial of Service (ReDoS) SNYK-PYTHON-PYGMENTS-5750273	pygments: 2.14.0 -> 2.15.0	No	No Known Exploit
	519/1000 Why? Has a fix available, CVSS 6.1	Information Exposure SNYK-PYTHON-REQUESTS-5595532	requests: 2.28.2 -> 2.31.0	No	No Known Exploit
	509/1000 Why? Has a fix available, CVSS 5.9	Information Exposure Through Sent Data SNYK-PYTHON-URLLIB3-5926907	urllib3: 1.26.14 -> 1.26.18	No	No Known Exploit
	424/1000 Why? Has a fix available, CVSS 4.2	Information Exposure Through Sent Data SNYK-PYTHON-URLLIB3-6002459	urllib3: 1.26.14 -> 1.26.18	No	No Known Exploit

(*) Note that the real score may have changed since the PR was raised.

Some vulnerabilities couldn't be fully fixed and so Snyk will still find them when the project is tested again. This may be because the vulnerability existed within more than one direct dependency, but not all of the affected dependencies could be upgraded.

Check the changes in this PR to ensure they won't cause issues with your project.

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Learn how to fix vulnerabilities with free interactive lessons:

🦉 Cross-site Scripting (XSS)
🦉 Regular Expression Denial of Service (ReDoS)