Fix documentation typo

Co-authored-by: Niko <zero@imaskeleton.me>

src/cache/mod.rs

@@ -57,7 +57,7 @@ type MessageCache = DashMap<ChannelId, HashMap<MessageId, Message>, BuildHasher>
 #[non_exhaustive]
 #[derive(Clone, Copy, Debug)]
 pub struct CacheInfo {
-    /// The name of the cahce
+    /// The name of the cache
     pub name: &'static str,
     /// The amount of cached values in the given Cache.
     pub count: usize,