Fix another version errors

README_RUS.md

constance/apps.py

constance/management/commands/constance.py

constance/templates/admin/constance/change_list.html

...ance/templates/admin/constance/includes/results_list.html

opds_catalog/sopdscan.py

requirements.txt

sopds_web_backend/templates/admin/base.html

sopds_web_backend/templates/sopds_logo.html

sopds_web_backend/templates/sopds_main.html