Update rtic_bare6.rs

examples/rtic_bare6.rs

@@ -211,7 +211,7 @@ fn clock_out(rcc: &RCC, gpioc: &GPIOC) {
 //
 //    `rcc.cfgr.sysclk(84.mhz()).pclk1(42.mhz()).pclk2(64.mhz()).freeze();`
 //
-//    ** your answer here **
+//      This should not be a problem, since the frequency is in range and they are valied numbers.
 //
 //    Start `stm32cubemx` and select or create a project targeting stm32f401.
 //    Go to the graphical clock configuration view.