Fix typo in peripheral.rs

embassy-hal-common/src/peripheral.rs

@@ -6,7 +6,7 @@ use core::ops::{Deref, DerefMut};
 /// This is functionally the same as a `&'a mut T`. The reason for having a
 /// dedicated struct is memory efficiency:
 ///
-/// Peripheral singletons are typically either zero-sized (for concrete peripehrals
+/// Peripheral singletons are typically either zero-sized (for concrete peripherals
 /// like `PA9` or `Spi4`) or very small (for example `AnyPin` which is 1 byte).
 /// However `&mut T` is always 4 bytes for 32-bit targets, even if T is zero-sized.
 /// PeripheralRef stores a copy of `T` instead, so it's the same size.