Update version number on login page

Author: nickidge

client/src/locales/client_en.po

@@ -656,8 +656,8 @@ msgstr "Could not initialize LiST country set"
 msgctxt "login"
 msgid "deprecation_warning"
 msgstr ""
-"Optima Nutrition has been upgraded to version 2.0. The legacy version, as "
-"well as existing projects, will be maintained until June 2022."
+"Optima Nutrition has been upgraded to version 2.2. The legacy version, as "
+"well as existing projects, will be maintained until June 2026."
 
 msgid "Access the legacy version here"
 msgstr "Access the legacy version here"