Peoples who are interested in globel geoplolitics care. The fucking UN of all things sudently opening a Russian account to deal in roubles is not an insignificant move, it undelign just how significant the ongoing shift in the currency makeup of international trade is and show that international organisations are staring to realize that they can't continue to deal exclusively in dollars forever.
Did you read the article? The UN opened an account for Russia to pay into the UN climate funding program while the bank tried to ask the US if it can pay into that specific program in rubles.
You should read more than a headline before jumping to conclusions.