stm32/irq: Fix typo in comment about priorities.

Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

ports/stm32/irq.h

@@ -98,8 +98,8 @@ static inline void restore_irq_pri(uint32_t state) {
 //
 // The default priority grouping is set to NVIC_PRIORITYGROUP_4 in the
 // HAL_Init function. This corresponds to 4 bits for the priority field
-// and 0 bits for the sub-priority field (which means that for all intensive
-// purposes that the sub-priorities below are ignored).
+// and 0 bits for the sub-priority field (which means that for all intents
+// and purposes, the sub-priorities below are ignored).
 //
 // While a given interrupt is being processed, only higher priority (lower number)
 // interrupts will preempt a given interrupt. If sub-priorities are active