fix: remove not needed trailing slash

Author: nijel

MANIFEST.in

@@ -2,7 +2,7 @@ include LICENSE
 include README.rst
 include *.md
 include requirements-*.txt
-recursive-include weblate_language_data/ *.py
+recursive-include weblate_language_data *.py
 recursive-include weblate_language_data/locale *.pot
 recursive-include weblate_language_data/locale *.po
 recursive-include weblate_language_data/locale *.mo