Welcome to the site !!
You should not have to change the plug , the "recommended" plug will run fine on the higher compression piston , the ONLY reason you would want a different heat range on the plug would be if you are running at high RPMS the majority of the time , then you would run a colder heat range , but not some "special" plug that is different from what the manufacturer recommends
Your plug choices should be (I would not recommend deviating from this)
1st the Standard plug would be NGK IFR8H11 or Nippon Denso VK24PRZ11 (this should work with any gas/race gas you would use and work fine with most temperatures and pretty much any compression piston you would use *for moto , street and trail riding*)
2nd choice would be the Colder plug NGK IFR9H11 , or Nippon Denso VK27PRZ11 (for running high RPM's almost all the time , like wide open Baja type riding)
I would not use any other plug in your bike , these were specifically designed to run in these bikes in stock and modified form and what the manufacturer has proven to not damage anything
I have run 11-1 to 13.5-1 on the stock heat range plug , with no issues ever , using pump gas and also using a mixture of 1 gal. 100LL Av Gas and 1.5 gal. 93 Non Ethanol Premium