Update jinja2 requirement from <3 to <4 in /docs in the pip group across 1 directory

[dependabot]

Updates the requirements on jinja2 to permit the latest version.
Updates jinja2 to 3.1.4

Release notes

Sourced from jinja2's releases.

3.1.4

This is the Jinja 3.1.4 security release, which fixes security issues and bugs but does not otherwise change behavior and should not result in breaking changes.

PyPI: https://pypi.org/project/Jinja2/3.1.4/ Changes: https://jinja.palletsprojects.com/en/3.1.x/changes/#version-3-1-4

• The xmlattr filter does not allow keys with / solidus, > greater-than sign, or = equals sign, in addition to disallowing spaces. Regardless of any validation done by Jinja, user input should never be used as keys to this filter, or must be separately validated first. GHSA-h75v-3vvj-5mfj

Changelog

Sourced from jinja2's changelog.

Version 3.1.4

Released 2024-05-05

• The xmlattr filter does not allow keys with / solidus, > greater-than sign, or = equals sign, in addition to disallowing spaces. Regardless of any validation done by Jinja, user input should never be used as keys to this filter, or must be separately validated first. :ghsa:h75v-3vvj-5mfj

Version 3.1.3

Released 2024-01-10

• Fix compiler error when checking if required blocks in parent templates are empty. :pr:1858
• xmlattr filter does not allow keys with spaces. :ghsa:h5c8-rqwp-cp95
• Make error messages stemming from invalid nesting of {% trans %} blocks more helpful. :pr:1918

Version 3.1.2

Released 2022-04-28

• Add parameters to Environment.overlay to match __init__. :issue:1645
• Handle race condition in FileSystemBytecodeCache. :issue:1654

Version 3.1.1

Released 2022-03-25

• The template filename on Windows uses the primary path separator. :issue:1637

Version 3.1.0

Released 2022-03-24

• Drop support for Python 3.6. :pr:1534
• Remove previously deprecated code. :pr:1544

... (truncated)

Commits

• dd4a8b5 release version 3.1.4
• 0668239 Merge pull request from GHSA-h75v-3vvj-5mfj
• d655030 disallow invalid characters in keys to xmlattr filter
• a7863ba add ghsa links
• b5c98e7 start version 3.1.4
• da3a9f0 update project files (#1968)
• 0ee5eb4 satisfy formatter, linter, and strict mypy
• 20477c6 update project files (#5457)
• e491223 update pyyaml dev dependency
• 36f9885 fix pr link
• Additional commits viewable in compare view

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