[url=https://app.bitcoin.com/news/]Source[/url]
You did not specify the link, that is not the link to the right news, I code you the link you embedded to let you know that I am right. Likely the news is some weeks or months old, not what is happening presently.
According to what I found online, Russia ruble has not been in its best since the invasion. Russia invaded Ukraine on February 24, ruble price increased during that time, since February 25th and got to its pick on March 11th which is its peak (on the the graph below). Ever since March 11th, ruble price has been on the decline and fall more than the price it was before the war.
https://www.xe.com/currencycharts/?from=USD&to=RUB
You are reading all wrong. You are comparing USD to RUB, when the line goes up it means you can buy more RUB with a dollar, so, the RUB worth less (or the dollar worth more) the higher the line. When the line goes down it means you can buy less RUB with a dollar, that's means RUB is getting stronger (or the dollar is getting weaker).
And yes, it is true that the RUB has recovered it is value and now worth more than before the war.