An update of the page with standards

Updated the page with the Russian bibliographic standards—removed GOST 7.12-93 and GOST 7.82-2001 that are already out-dated, and added two new standards: GOST R 7.0.12-2011 (word shortening in Russian, in supersession of GOST 7.12), and GOST R 7.0.108-2022 (bibliographic references to online resources, formally a new standard, but actually a replacement for GOST 7.82).