spelling: variable

Signed-off-by: Josh Soref <[email protected]>

platform/robert/boot/src/util/delay.c

@@ -39,7 +39,7 @@ void delay_us(uint32_t us) {
 
 void delay_ms(uint32_t millis) {
   // delay_us(millis*1000) is not used because a long delay could easily
-  // overflow the veriable. Without the outer loop, a delay of even five
+  // overflow the variable. Without the outer loop, a delay of even five
   // seconds would overflow.
   while (millis--) {
     delay_us(1000);