Bump doc requirements.

Author: Julian

docs/requirements.txt

@@ -10,34 +10,32 @@ babel==2.11.0
     # via sphinx
 beautifulsoup4==4.11.1
     # via furo
-certifi==2022.9.24
+certifi==2022.12.7
     # via requests
 charset-normalizer==2.1.1
     # via requests
 docutils==0.19
     # via sphinx
-furo==2022.9.29
+furo==2022.12.7
     # via -r docs/requirements.in
 idna==3.4
     # via requests
 imagesize==1.4.1
     # via sphinx
 jinja2==3.1.2
     # via sphinx
-lxml==4.9.1
+lxml==4.9.2
     # via sphinx-json-schema-spec
 markupsafe==2.1.1
     # via jinja2
-packaging==21.3
+packaging==22.0
     # via sphinx
 pyenchant==3.2.2
     # via sphinxcontrib-spelling
 pygments==2.13.0
     # via
     #   furo
     #   sphinx
-pyparsing==3.0.9
-    # via packaging
 pytz==2022.6
     # via babel
 requests==2.28.1