Fix subscribe docs.rs link
@@ -66,7 +66,7 @@ If you would like to work with structured data without paying expensive deserial
* zero-copy reads
* [write batches](https://docs.rs/sled/latest/sled/struct.Tree.html#method.apply_batch)
* [subscribe to changes on key
- prefixes](struct.Tree.html#method.watch_prefix)
+ prefixes](https://docs.rs/sled/latest/sled/struct.Tree.html#method.watch_prefix)
* [multiple keyspaces](https://docs.rs/sled/latest/sled/struct.Db.html#method.open_tree)
* [merge operators](https://docs.rs/sled/latest/sled/doc/merge_operators/index.html)
* forward and reverse iterators over ranges of items
