docs: Add missing dependency (#3438)

pyproject.toml

@@ -75,6 +75,7 @@ sphinxcontrib-websupport = "==2.0.0"
 sphinxemoji = "==0.3.1"
 sphinx-toggleprompt = "==0.5.2"
 autodocsumm = "==0.2.13"
+beautifulsoup4 = "==4.12.3"
 openpyxl = { version = ">=3.1.5", optional = true }
 plotly = { version = ">=5.22.0", optional = true }
 python-pptx = { version = ">=0.6.23", optional = true }