[Prod] Update dependency pdoc to v15.0.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
pdoc	15.0.2 → 15.0.4

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Release Notes

mitmproxy/pdoc (pdoc)

v15.0.4

Compare Source

• Include included HTML headers in the ToC by default by enabling markdown2's mixed=True option of the header-ids extra
  (#​806, @​mrossinek)
• Make pdoc . work to document the module in the current directory.
  (#​813, @​mhils)

v15.0.3

Compare Source

• Add missing styles for Github's markdown alerts.
  (#​796, @​Steve-Tech)

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