stack/slapos.cfg: lxml version up 4.9.1->5.2.1

only for python3

We now need to install lxml-clean-html separately, see the following
message:

  File "/srv/slapgrid/slappart71/srv/runner/software/e16145ec9280f63bd6c28ca2758d03f0/develop-eggs/lxml-5.2.1-py3.9-linux-x86_64.egg/lxml/html/clean.py", line 18, in <module>
    raise ImportError(
ImportError: lxml.html.clean module is now a separate project lxml_html_clean.

component/jupyter/buildout.cfg

@@ -49,6 +49,7 @@ eggs =
   openpyxl
   sympy
   xlrd
+  lxml-html-clean
 # additional eggs for jupyterlab
   jupyterlab
   jupyterlab-launcher

stack/slapos.cfg

@@ -229,7 +229,8 @@ jupyterlab-pygments = 0.1.2
 lock-file = 2.0
 lockfile = 0.12.2:whl
 lsprotocol = 2023.0.0b1:whl
-lxml = 4.9.1
+lxml = 5.2.1
+lxml-html-clean = 0.1.1
 manuel = 1.11.2
 MarkupSafe = 2.1.3
 matplotlib = 2.1.2
@@ -392,6 +393,7 @@ importlib-metadata = 1.7.0:whl
 itsdangerous = 0.24
 Jinja2 = 2.11.3
 jsonschema = 3.0.2:whl
+lxml = 4.9.1
 MarkupSafe = 1.0
 msgpack = 0.6.2
 packaging = 16.8