fixup!

Co-authored-by: ROMemories <[email protected]>

examples/coap/src/oluru.rs

@@ -93,7 +93,7 @@ pub trait PriorityLevel {
 /// doubly linked list, and keeping head indices of each level (which is why the number of levels
 /// `L` is part of the type).
 ///
-/// The value list following the style of a Vec means that popping elements from anywhere but the
+/// The value list following the style of a `Vec` means that popping elements from anywhere but the
 /// tail is costly, which it should better not be; a slab allocator style would improve that.
 ///
 /// ## Terminology