Bump xhtml2pdf from 0.2.7 to 0.2.8 (soxoj#522)

Bumps [xhtml2pdf](https://github.com/xhtml2pdf/xhtml2pdf) from 0.2.7 to 0.2.8.
- [Release notes](https://github.com/xhtml2pdf/xhtml2pdf/releases)
- [Commits](xhtml2pdf/xhtml2pdf@v0.2.7...v0.2.8)

---
updated-dependencies:
- dependency-name: xhtml2pdf
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -30,7 +30,7 @@ torrequest==0.1.0
 tqdm==4.64.0
 typing-extensions==4.2.0
 webencodings==0.5.1
-xhtml2pdf==0.2.7
+xhtml2pdf==0.2.8
 XMind==1.2.0
 yarl==1.7.2
 networkx==2.5.1