fix(deps): update dependency beautifulsoup4 to v4.13.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
beautifulsoup4 (changelog)	4.8.2 -> 4.13.4

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
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The artifact failure details are included below:

File name: poetry.lock

Updating dependencies
Resolving dependencies...

Creating virtualenv mitx_pro-p3w2_suf-py3.13 in /home/ubuntu/.cache/pypoetry/virtualenvs

Because wagtail (5.2.8) depends on beautifulsoup4 (>=4.8,<4.12)
 and mitx pro depends on beautifulsoup4 (4.13.4), wagtail is forbidden.
So, because mitx pro depends on wagtail (5.2.8), version solving failed.