Update the documentation to use linking by name

See https://doc.rust-lang.org/stable/rustdoc/linking-to-items-by-name.html

libraries/persistent_store/src/driver.rs

@@ -12,6 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//! Store wrapper for testing.
+//!
+//! [`StoreDriver`] wraps a [`Store`] and compares its behavior with its associated [`StoreModel`].
+
 use crate::format::{Format, Position};
 #[cfg(test)]
 use crate::StoreUpdate;