Update dependency lxml to ~=5.2.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
lxml (source, changelog)	~=5.1.0 -> ~=5.2.1

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Release Notes

lxml/lxml (lxml)

v5.2.1

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Bugs fixed

• LP#2059910: The minimum CPU architecture for the Linux x86 binary wheels was set back to
  "core2", but with SSE 4.2 enabled.

• LP#2059977: Element.iterfind("//absolute_path") failed with a SyntaxError
  where it should have issued a warning.

• GH#416: The documentation build was using the non-standard which command.
  Patch by Michał Górny.

v5.2.0

Compare Source

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Other changes

• LP#1958539: The lxml.html.clean implementation suffered from several (only if used)
  security issues in the past and was now extracted into a separate library:

  https://github.com/fedora-python/lxml_html_clean

  Projects that use lxml without "lxml.html.clean" will not notice any difference,
  except that they won't have potentially vulnerable code installed.
  The module is available as an "extra" setuptools dependency "lxml[html_clean]",
  so that Projects that need "lxml.html.clean" will need to switch their requirements
  from "lxml" to "lxml[html_clean]", or install the new library themselves.

• The minimum CPU architecture for the Linux x86 binary wheels was upgraded to
  "sandybridge" (launched 2011), and glibc 2.28 / gcc 12 (manylinux_2_28) wheels were added.

• Built with Cython 3.0.10.

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