Typo fix RealStore.kt (#662)

Signed-off-by: Shabinder Singh <contact@shabinder.in>

Author: Shabinder

store/src/commonMain/kotlin/org/mobilenativefoundation/store/store5/impl/RealStore.kt

@@ -104,7 +104,7 @@ internal class RealStore<Key : Any, Network : Any, Output : Any, Local : Any>(
 
             val stream: Flow<StoreReadResponse<Output>> =
                 if (sourceOfTruth == null) {
-                    // piggypack only if not specified fresh data AND we emitted a value from the cache
+                    // piggyback only if not specified fresh data AND we emitted a value from the cache
                     val piggybackOnly = !request.refresh && cachedToEmit != null
                     @Suppress("UNCHECKED_CAST")