Update RELEASE_NOTES.md for 1.4.30 release (#5451)

RELEASE_NOTES.md

@@ -1,9 +1,29 @@
 #### 1.4.30 December 13 2021 ####
-**Placeholder for nightlies**
+Akka.NET v1.4.30 is a minor release that contains some enhancements for Akka.Streams and some bug fixes.
+
+New features:
+* [Akka: Added StringBuilder pooling in NewtonsoftJsonSerializer](https://github.com/akkadotnet/akka.net/pull/4929)
+* [Akka.TestKint: Added InverseFishForMessage](https://github.com/akkadotnet/akka.net/pull/5430)
+* [Akka.Streams: Added custom frame sized Flow to Framing](https://github.com/akkadotnet/akka.net/pull/5444)
+* [Akka.Streams: Allow Stream to be consumed as IAsyncEnumerable](https://github.com/akkadotnet/akka.net/pull/4742) 
+
+Bug fixes:
+* [Akka.Cluster: Reverted startup sequence change](https://github.com/akkadotnet/akka.net/pull/5437)
+
+If you want to see the [full set of changes made in Akka.NET v1.4.30, click here](https://github.com/akkadotnet/akka.net/milestone/61).
+
+| COMMITS | LOC+ | LOC- | AUTHOR |
+| --- | --- | --- | --- |
+| 6 | 75 | 101 | Aaron Stannard |
+| 2 | 53 | 5 | Brah McDude |
+| 2 | 493 | 12 | Drew |
+| 1 | 289 | 383 | Andreas Dirnberger |
+| 1 | 220 | 188 | Gregorius Soedharmo |
+| 1 | 173 | 28 | Ismael Hamed |
 
 #### 1.4.29 December 13 2021 ####
 **Maintenance Release for Akka.NET 1.4**
-Akka.NET v1.4.28 is a minor release that contains some enhancements for Akka.Streams and some bug fixes.
+Akka.NET v1.4.29 is a minor release that contains some enhancements for Akka.Streams and some bug fixes.
 
 New features:
 * [Akka: Added a channel based task scheduler](https://github.com/akkadotnet/akka.net/pull/5403)