Fix some typos, clarify in CHANGES.md

Author: elizarov

CHANGES.md

@@ -5,12 +5,12 @@
 * Fixed `StackOverflowError` in `Job.toString` when `Job` is observed in its intermediate state (#2371).
 * Improved liveness and latency of `Dispatchers.Default` and `Dispatchers.IO` in low-loaded mode (#2381).
 * Improved performance of consecutive `Channel.cancel` invocations (#2384).
-* `SharingStarted` is not `fun` interface (#2397).
+* `SharingStarted` is now `fun` interface (#2397).
 * Additional lint settings for `SharedFlow` to catch programmatic errors early (#2376).
 * Fixed bug when mutex and semaphore were not released during cancellation (#2390, thanks to @Tilps for reproducing).
 * Some corner cases in cancellation propagation between coroutines and listenable futures are repaired (#1442, thanks to @vadimsemenov).
 * Fixed unconditional cast to `CoroutineStackFrame` in exception recovery that triggered failures of instrumented code (#2386).
-* Platform classifier is removed from `kotlinx-coroutines-javafx` (#2360). 
+* Platform-specific dependencies are removed from `kotlinx-coroutines-javafx` (#2360). 
 
 ## Version 1.4.1