Merge pull request #1722 from RogerHaase/1700-install-docs

update install docs for python 3.12 pkg_resources workaround #1700

Author: RogerHaase

docs/admin/install.rst

@@ -49,6 +49,17 @@ After installation, you should have a ``moin`` command available, try it:
 
  moin --help
 
+If you are running Python 3.12.+ and get a traceback with::
+
+ ModuleNotFoundError: No module named 'pkg_resources'
+
+then you must install setuptools manually::
+
+ pip install setuptools
+
+and retry `moin --help`
+
+
 Creating a wiki instance
 ========================