docs/conf.py: fixed version importing

Author: sami-m-g

docs/conf.py

@@ -7,13 +7,13 @@
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
 
 import datetime
-import importlib.metadata
+from lxmlh import __version__
 
 
 project = 'lxmlh'
 copyright = f'{datetime.date.today().year}, Mina Sami'
 author = 'Mina Sami'
-version = release = importlib.metadata.version('lxmlh')
+version = release = __version__
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration