build(deps): bump sphinxcontrib-htmlhelp from 2.0.1 to 2.0.4 in /docs (#2671)

Author: dependabot[bot]

docs/requirements.txt

@@ -21,7 +21,7 @@ sphinx-rtd-theme==1.3.0
 sphinxcontrib-applehelp==1.0.7
 sphinxcontrib-devhelp==1.0.5
 sphinxcontrib-serializinghtml==1.1.9
-sphinxcontrib-htmlhelp==2.0.1
+sphinxcontrib-htmlhelp==2.0.4
 sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-qthelp==1.0.6
 urllib3==2.0.4