Merge pull request #902 from searxng/dependabot/pip/master/lxml-4.8.0

Bump lxml from 4.7.1 to 4.8.0

requirements.txt

@@ -3,7 +3,7 @@ babel==2.9.1
 flask-babel==2.0.0
 flask==2.0.2
 jinja2==3.0.3
-lxml==4.7.1
+lxml==4.8.0
 pygments==2.11.2
 python-dateutil==2.8.2
 pyyaml==6.0