Fix typo in Combine (#2540)

Author: lcdsmao

kotlinx-coroutines-core/common/src/flow/internal/Combine.kt

@@ -23,7 +23,7 @@ internal suspend fun <R, T> FlowCollector<R>.combineInternal(
     val size = flows.size
     if (size == 0) return@flowScope // bail-out for empty input
     val latestValues = arrayOfNulls<Any?>(size)
-    latestValues.fill(UNINITIALIZED) // Smaller bytecode & faster that Array(size) { UNINITIALIZED }
+    latestValues.fill(UNINITIALIZED) // Smaller bytecode & faster than Array(size) { UNINITIALIZED }
     val resultChannel = Channel<Update>(size)
     val nonClosed = LocalAtomicInt(size)
     var remainingAbsentValues = size