Update tox.ini && conf.py file

Performed-by: gitea/infra/otc-metadata/tools/generate_doc_confpy.py

tox.ini

@@ -26,6 +26,7 @@ deps = -r{toxinidir}/doc/requirements.txt
 allowlist_externals =
   mkdir
   cp
+  find
 commands =
   {[testenv:api-ref]commands}
   {[testenv:json-api-ref]commands}