Update lxml requirement from ~=5.3.2 to ~=5.4.0 (#169)

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

Author: dependabot[bot]

requirements.txt

@@ -8,7 +8,7 @@ docutils~=0.21.2
 idna~=3.10
 imagesize~=1.4.1
 Jinja2~=3.1.6
-lxml~=5.3.2
+lxml~=5.4.0
 m2r2~=0.3.3.post2
 MarkupSafe~=3.0.2
 mistune~=0.8.4