BUG: Fix lxml import in show_versions (pandas-dev#23949)

* BUG: Fix lxml import in show_versions

Fixes pandas-dev#23934

Author: nixphix

pandas/util/_print_versions.py

@@ -85,7 +85,7 @@ def show_versions(as_json=False):
         ("xlrd", lambda mod: mod.__VERSION__),
         ("xlwt", lambda mod: mod.__VERSION__),
         ("xlsxwriter", lambda mod: mod.__version__),
-        ("lxml", lambda mod: mod.etree.__version__),
+        ("lxml.etree", lambda mod: mod.__version__),
         ("bs4", lambda mod: mod.__version__),
         ("html5lib", lambda mod: mod.__version__),
         ("sqlalchemy", lambda mod: mod.__version__),