Fix spelling

arena.h

@@ -172,7 +172,7 @@ Arena arena_create(size_t region_capacity);
 void arena_free(Arena *a);
 void arena_reset(Arena *a);
 
-// Allocation other utilities
+// Allocation and other utilities
 void *arena_alloc(Arena *a, size_t size);
 void *arena_copy(Arena *a, const void *src, size_t size);
 char *arena_strdup(Arena *a, const char *s);