By Matthew Cooper Michael Schumacher’s former rival Damon Hill has paid tribute to the Formula 1 legend, who suffered a life-changing brain injury while skiing a decade ago. December 29 will mark the 10-year anniversary of the accident, with Schumacher now receiving constant medical treatment at home in Switzerland. And Hill, who was involved in a fierce rivalry with Schumacher during the 1990s, says what happened to the German is a reminder to “treasure every day”. Speaking to the PA news agency, Hill said: “It is a terrible tragedy. This is not how you want anyone to end up. It makes you tre…